Lina looked around nervously as they rolled out their yoga mats in the hot room.

"Here?" she asked quietly.

"Sure, any place is good. I like to be a bit further back in class; it is easier to watch people," Mark replied with a smile.

She loved the hot yoga classes. They always brought a feeling of deep relaxation to her body, but being surrounded by fit, flexible young bodies made her question her own fitness and body shape. She wanted Mark to look at her the way he looked at other beautiful, fit women.

She smiled at Mark, "Ok, perfect!"

She glanced around nervously as people slowly made their way into class. She knew Mark loved these hot yoga classes. Many of the students and most of the instructors knew him, and she enjoyed the sideways, and often jealous, looks they gave her when they walked in together. She loved watching his body move during the class, as his muscles flexed and glowed with sweat in the hot room. She always ended the classes wound up and horny, leading to fantastic sex as Mark's pounding hips helped release her pent-up energy.

She had to admit that all the hard work she had been doing with Mark at the gym had elevated her fitness and toned her body. She enjoyed tracking her progress in the mirror, her stomach tightening and her legs strengthening. She looked at her body with newfound appreciation; it was another matter, however, to place herself in a situation where Mark might compare her to other women.

People shuffled around, arranging themselves and their accessories as she settled back on the mat to close her eyes and calm her nerves. Mark lay beside her, whispering quiet assurances and instructions. She tried to slow her breathing as she encouraged the heat to soak into her muscles. The muted conversations of the other students filled the class with a calming white noise.

She could feel herself sweating in the room's dark, damp heat, her chest and neck glistening. She felt a droplet of sweat slowly running down her neck and between her breasts, marvelling at the unexpected sensuality. When she opened her eyes to glance at Mark, she saw his eyes widen as he watched the droplet disappear into her cleavage. She lay back and smiled to herself, confident, for the moment, in her body.

"Hello, welcome; I hope everyone had a great day," the instructor said quietly as she closed the door and walked to the front of the class.

The instructor laughed as random voices from around the room replied.

"Let's jump right in," the instructor started cheerily.

Lina tensed up immediately. Even though the class started easily, Lina glanced around furtively to ensure she performed the poses correctly, not wanting to embarrass Mark in any way. She slowly gained confidence as she flowed through the sequences, finding her anxiety with her body and the workout easing as she progressed. Gaining confidence, she could focus on the muscular bodies flexing around her. Lina's belly fluttered with light sexual anticipation as she cautiously drank in the sights around her.

She flowed between poses, enjoying the feeling of her breasts swinging freely in her light shirt. However, she soon realized the friction generated between her sensitive nipples and her top was gradually adding to the pressure in her belly. She also found each lunge dragged the seam of her tights between her legs, causing her to second-guess her impulsive decision to ditch her thong before class, hoping Mark would notice and get turned on. She watched Mark move whenever possible, enjoying how his muscles rippled and strained as he effortlessly flowed between poses.

As she moved into a wide-legged fold at the side of her mat, Lina glanced up and was greeted by a pair of short shorts pulled up tight into the ass of the woman in front of her. Her eyes wandered up and down the fit, smooth legs, returning repeatedly to her firm round butt. She felt a quick surge in her belly. Averting her eyes, she fought to bring her rising sexual tension under control.

As they flowed back to the front of the mat, she focused on the two lovely women directly in front of her. They were both very fit, wearing tight black leggings and skimpy sports bras. Their leggings were pulled up tight into their round butts, showing no panty lines, thong or otherwise. Lina caught herself staring and felt a surge of wetness between her legs, her breath catching in her throat. She felt a hot, red blush spread rapidly from her chest up her neck.

She glanced around to see if anyone noticed her rising flush. It dawned on her now that watching fit women exercise really turned her on. She always thought it was just watching Mark that got her so revved up in these classes, but she now had to admit that the firm bodies of the women around her had a similar effect. As she continued to admire the women in front of her, she started to imagine how they would look naked. She could feel her nipples harden, dragging sensually across her shirt as she moved. The flutters in her belly intensified. Lina pushed her chest out at every opportunity, intentionally increasing the sensation.

As she twisted and turned with the poses, she increasingly found chances to apply pressure to her breasts, to graze her hardening nipples with the back of her hand, and to run her nails lightly up the inside of her legs. Her body reacted to the stimulation, her nipples swelled, and her clit throbbed.

As they moved through the final set of poses, Lina struggled with the power of her body's response. She was thankful the sweat generated by the hot room concealed the physical evidence of her arousal. The class finally ended, and she collapsed into a reclined pose; the lights dimmed, and the instructor's voice slowed to calm the students. Lina squirmed on the mat, attempting to find a comfortable position. Her body tingled, and her nipples ached as they rubbed gently on her shirt in time with her breath. Her tights had pulled up into her crotch, sneaking into the folds of her swollen pussy. The pressure in her belly had thankfully plateaued but remained at a level where the need to touch herself was becoming irresistible.

"Get a hold of yourself, girl," she whispered.

She fought to calm her breath, afraid to look at Mark and his sweat-soaked muscles for fear of driving her arousal even higher. She squirmed, trying to reduce the pressure from her tights, but only served to nestle them more tightly between her legs. A shock of pleasure and panic spiked in her belly.

She froze as she tried to evaluate the situation. Holding her breath reduced the pressure to a manageable level, but she knew she would have to breathe soon. A quick breath forced the seam of her tight across her now pulsing clit. As her panic rose, her heaving chest moved the seam up and down between her legs. She strained to calm down, realizing the ache between her legs was rising incessantly.

"Relax, breathe, just relax," she murmured as the telltale signs of an orgasm started to build in her belly.

"Fuck, no, not here, fuck," she whispered, causing Mark to look over at her.

She smiled back, hoping he could not tell what was happening. Mark returned her smile and closed his eyes. The instructor had finished talking them through their final meditation and lowered the lights further. Lina wiggled around frantically but only succeeded in increasing the friction between her legs. She could feel her nipples swelling on her chest, a sure sign her orgasm was rushing to overwhelm her.

"Oh my god," she thought, "I am going to come right here."

She contemplated getting up and leaving the room but feared drawing any more attention to herself. She also wondered if the mere act of standing might trigger her orgasm. She bore down, trying to hold on to the rising wave. Her imagination began to betray her body as she considered whether the two women in front of her could hear her struggles. Images of tight butts and plump pussies, encased in black tights filled her mind. She could feel tiny pulses deep in her pussy as her orgasm grew uncontrollably.

"Oh fuck, I am going to come, fuck, fuck," she thought desperately.

She worked her hands slowly to her side, gripping her tights in one final, valiant attempt to remove the seam from contact with her clit. All she managed to do was drag it roughly side to side, driving her orgasm closer to the surface. Her lust-filled imagination jumped into overdrive. She imagined one of the women rising in the dark room and crawling over to ensure she was ok. She saw the woman kneeling between her legs, her tights gone, as if by magic. The woman pushed her knees apart, lowered her head and dragged her tongue gently up Lina's wet sex.

"Lick me, fuck yes, lick me," she imagined, "make me come, baby, please."

Her hips rocked gently in response to the imagined stimulation. The woman smiled between her legs, beautiful and soft. Her small breasts capped with hard red nipples. Lina wanted to suck and lick those nipples. Her orgasm rushed ahead now that she was no longer able to hold it back.

"Put your fingers in me," she begged, "push them in deep."

She watched the beautiful woman suck two of her fingers into her mouth. She swirled her tongue, lubricating them. She moved them to Lina's pussy and slid them down across her clit, parting her thick lips. She paused and then dragged them back up before pushing them slowly, so slowly, into Lina's hungry pussy. The woman's thumb moved to Lina's clit. Her fingers thrust deep as her thumb swirled in circles. Lina imagined her hands moving to the woman's ripe nipples, feeling them harden under her fingers. Her own nipples stiffened painfully at the thought. The woman between her legs lowered her mouth to her clit, flicking her tongue, just glancing at the hard nub. Lina's hips surged forward, driving her clit towards the imagined stimulation. She begged the woman for release.

"Suck it, baby, please," she thought, "I want to come in your mouth."

The beautiful woman smiled as she pushed her fingers deep into Lina's pussy, her knuckles grinding against the edges. In and out, driving Lina's orgasm higher without letting it peak.

"Oh my god, fuck me, make me come, please," she begged.

Finally, the woman lowered her mouth to Lina's clit, sucking it into her mouth, swirling her tongue around the hard button. Holding that image, Lina felt her orgasm overtake her.

"Oh my god, yes, fuck, yes, coming," she mouthed silently.

She wanted to scream out her pleasure; the release was so incredibly intense. She held her breath as the spasms raced through her body. Her pussy and ass twitched, her stomach clenched over and over. The contractions in her body, hidden in the dark room, dragged the seam of her tights across her inflamed clit, prolonging her orgasm. She felt a new rush of wetness between her legs, feeling it leak down over her convulsing ass. Her fingers clenched the mat, desperate to regain control of her body.

Each pulse of her orgasm synchronized with an imagined thrust of fingers into her desperate pussy. Each spasm in her ass corresponded with grinding circles of a thumb on her clit. Her body responded in harmony with the imagined stimulation. Lina held her breath through the entire orgasm, afraid that she would scream if she allowed herself to breathe. Eventually, the orgasmic swells subsided. Lina risked taking a breath as the intensity of her body's reaction lessened.

Five minutes later, her heart still beating rapidly, the instructor called an end to the class. Lina stood on weak legs as she gathered her towel and mat. Looking up, she noticed Mark staring at her. Glancing down, she saw her heavy breasts wet and glistening in her shirt; her nipples still rock hard. She rolled up her mat quickly, afraid that she had created a huge wet spot. She gave Mark a quick smile and a wink as she walked quickly to the changing room, her ass swinging as he watched.

Lina desperately needed to grab a shower to rinse off her orgasm before the room filled. She threw her mat on the bench, grabbed a towel and walked quickly to a stall. Closing the curtain, she started the shower as she removed her sweaty, sex-soaked clothes. She jumped in while the shower was still running cold, letting the water cascade over her shoulders. Her fingers moved subconsciously back to her nipples, pinching and pulling. She felt the pressure in her belly build again immediately. She lowered one hand to her pussy, grazing across her still-swollen clit. The spike of pleasure almost made her knees give out. She turned the water full to cold and forced her hands away from her body. She finished her shower quickly, knowing there would be a line waiting., wrapping the towel around herself to return to the bench with her clothes.

Lina dried off, her back to the room, worried everyone would be able to tell how aroused she was. She pulled on a pair of loose cotton pants and turned to sit on the bench to dry her hair. Glancing up past her towel, she saw the two women from the class standing across the room talking. Both were naked, towelling off from their showers. Lina felt the flutters in her belly as she watched them through her wet bangs. They displayed little modesty, bending and twisting as they talked and towelled off, oblivious to what they exposed or who they exposed it to. Lina felt a sudden rush when one of them bent over to reveal a tight pink ass nestled above a well-shaved pussy. Lina's hands involuntarily raised her towel to her breasts, dragging the rough cloth across her nipples. Her pussy spasmed as electric shocks pulsed from her nipples directly to her clit.

Lina stood quickly and turned her back to the women. She pulled her light shirt over her head and grabbed her bag. She exited the changing room without a backward glance, afraid another orgasm would leave her gasping in the middle of the changing room. She walked down the hall and spotted Mark talking with a group of young yoga instructors. A smile lit up his face as she approached. His eyes locked on her hard nipples as she drew near, winking as he turned to walk beside her. They talked quietly on the way back to the car, Lina giving him a little play-by-play of the change room experience. When she shyly admitted to having an orgasm in class, Mark laughed and teased her the entire walk back to the car, fishing for details about which women she found most exciting.

They reached the car and began the short drive back to her house. She was quiet now; her thoughts swirled, filled with images of tight bodies and pink skin. She could feel the flutters in her belly growing, becoming an insistent pressure. Several times, she reached up under her loose shirt to pinch a nipple, spiking her arousal. They pulled into her driveway and walked to her house, chatting on the front porch. Lina's thoughts were far away as they talked on the porch. She noticed Mark staring at her chest. Looking down, she realized her breast was almost totally exposed, her shirt pulled down by her bag. Mark reached out to run his hand down her cleavage, reaching into her shirt to grab her nipple and breast. Her knees sagged as jolts of electricity pulsed through her.

Her lust overcame all other thoughts as she asked Mark to come in and help relieve some of her energy. He instantly agreed. She rushed up the stairs, threw her bag and clothes in the corner and crawled on the bed. Pulling her knees up, she lay back, exposing herself to Mark.

"Fuck I am a little slut," she thought, "I am dripping wet again."

Mark smiled and lay between her legs, helping her legs wider, further spreading her swollen pussy. She could feel her pussy pulsing, opening, and flowing with wetness. Her fingers moved to her nipples, pinching and pulling. Mark stroked her legs, his strong hands kneading her tired muscles. Lina began to give a shy voice to some of the images floating through her head.

"Fuck I am so turned on; I can feel electric shocks shooting from my nipples to my clit," she gasped.

"Did you see those two in class?" she whispered, "I kept imagining them naked, wondering if they would get turned on by my body. And then, when I saw them naked in the changing room, I kept wondering what it would be like to go down on one of them. Do you think I could make them come, Mark?"

She closed her eyes as she lay back on the pillows. Her fingers stroked and pulled at her nipples, her hips rocking up and down. She desperately wanted Mark to touch her, lick her, and slide his fingers up inside her hot wet pussy, anything.

"She was so pretty; I bet she tasted like cherries," she continued quietly, "I would lick her until she came. Then she would lick my clit and push her fingers into my pussy, fuck, I would come hard if she did that."

"After she came, you could fuck her, Mark, fuck her while I sat on her face. I would love to watch your cock disappear into her tight pussy," she moaned.

"When you were ready to come, you could pull your hard cock out and put it in my mouth. I would be able to taste her sweet pussy on your cock and then feel you spray into my mouth."

Lina's hips rocked up and down in the air, seeking stimulation. She felt her pussy opening and closing as wetness leaked down over her tight ass. She forced her legs to stay open, resisting the urge to apply pressure from her thighs to her desperate clit. She realized she might come just by playing with her breasts.

"I think I am going to come, Mark," she moaned. "Can you tell?"

Her breath came in gasps as she pulled at her nipples. She slid her hands up to grab her entire breast, squeezing and massaging it as she slid her hand towards her hard nipples. Each stroke ended as she pulled her nipple painfully out from her chest. Each squeeze triggered twitches in her pussy. The pressure increased inexorably, not in the usual frantic rush to release as she rubbed her clit, but in a slow, steady, unstoppable build. Each pinch of her nipple edged her closer to the peak.

"My god, I am so close, so close, each pinch sends me higher," she moaned.

She pictured the blonde woman lying on the bed, lights dimmed, the room warm. Lina's tongue swirled in her mouth, her hands cupped her soft breasts, fingers stroking her hard nipples. Lina imagined herself dragging her tongue down the woman's neck and between her breasts. She pushed the woman deeper into the covers as her tongue moved wetly down her belly, poised to dive between her legs. Lina imagined her tongue swirling around the woman's wet clit; her fingers exploring inside her pulsing hole. She pictured the woman screaming out in the throes of an orgasm, her pussy squeezing her fingers. Suddenly, the wave broke over her.

"Fuck I am coming, holy fuck yes," she cried out.

Mark kept her legs apart, watching her pussy spasm. Her belly clenched as her orgasm throbbed. She felt wetness pouring over her ass, which opened and closed in time with her orgasm. Her pussy pulsed, her clit throbbed, and her orgasm wracked her body; her moans continued. As the spasms finally slowed, she opened her eyes to see Mark staring at her, a smile plastered across his face.

"God, I am so turned on; what the fuck is going on," she laughed, "I need ten more of those."

Smiling, Mark lowered his head and started flicking his tongue gently over her clit.

"Holy fuck, I am sensitive, yes, keep licking; make me come again, baby," she gasped.

Mark continued to lick softly around her clit, biting and nibbling alternately at her inner thigh and pussy lips. She rolled her nipples between her fingers, her eyes closed, as she moaned softly. He wrapped his lips around her clit, sucking it into his mouth, his tongue swirling around the hard nub. She rocked her hips up and down, grinding against his tongue. She felt the pressure build rapidly this time as a smaller orgasm rolled through her body.

"Fuck yes, coming again, fuck," she squealed.

Her eyes closed tight, images of naked, fit women running through her head. She felt Mark licking and biting as he pushed her legs back, rotating her pussy up towards his mouth. Her hips surged towards his mouth; she wanted constant stimulation; she no longer cared where or how it happened.

She felt his tongue slide up her dripping hole, straight up the middle, sliding roughly across her clit at the top. Repeating this motion over and over. She felt another orgasm building; her pussy opened wide and flowed non-stop. Suddenly he latched onto her clit, a spike of pleasure surging in her belly. Almost before she realized what he was doing, he had lowered his mouth back to her twitching pussy. His tongue pushed inside her, lapping up the wetness. She desperately wanted him inside her now, wanted to feel her pussy stretched by his swollen cock.

She pictured his cock sliding into her hot depths and then slowly pulling out. She could feel her tight pussy stretching and gripping its width. She imagined wrapping her legs around his muscular waist, pulling his cock deeper inside her, feeling it invade her belly. His tongue moved inside her like a small cock, triggering her next orgasm.

"Coming again, right there, yes, fuck me with your tongue, fuck yes." she squealed.

She panted as her orgasm washed over her. Her hands never left her nipples, pulling and pinching; they felt stiff and swollen on her sweaty breasts.

"Keep going, please," she begged breathlessly.

Pushing her legs up, Mark rolled her tight ass into view. Lina's eyes widened as she watched his head lower towards her ass. She loved the sensation when he played with her ass, but her modesty continued to make her self-conscious about the act. She felt his thumb on her clit, rubbing in small circles. Her ass pushed up involuntarily towards his tongue. Spikes of pleasure rose within her as his tongue swirled around her tight hole.

A gasp exploded from her mouth, "Fuck yes, oh my god, yes!"

She screamed for him to push it in.

"Fuck my ass with your tongue, please, fuck yes," she moaned.

Lina felt her ass open easily as Mark pushed his tongue inside, moving it slowly in and out, probing deeper each time. Her hips rocked to meet his tongue, urging it deeper. His thumb relentlessly circled her clit.

"If I was 69ing with the brunette," she moaned. "do you think she would lick my ass?"

"Oh my god, Mark, when that hot brunette bent over in the changing room, I could see her tight pink hole. It was so smooth. I wanted to stick my tongue in it," she moaned, "I want her to beg me to lick her ass, to beg me to make her come. I want to feel her come with my tongue in her ass."

Mark pushed his tongue deeper into her ass, his thumb circling mercilessly on her clit. Her body was on fire, spikes of pleasure cascading through her body. She squeezed her breasts and pulled her nipples, driving herself higher.

"I want her to come on my face, to cover my face with her orgasm. Fuck yes, oh fuck, make my ass come, please don't stop," she begged.

Lina's orgasm loomed, nearing its peak again. Mark's tongue fucked her ass, his thumb slid across her clit, and her fingers stroked her nipples non-stop. She rose to the peak and fell, moaning over the top.

"Coming, holy fuck, I'm coming," she gasped, "my ass is coming."

Lina pushed against Mark's tongue as she rode out her orgasm, finding herself immediately rising towards a new peak. Her breath felt ragged in her chest; her belly contracted endlessly, and the peaks and valleys of her ecstasy surged through her body without stopping. It became hard to tell where one orgasm stopped and the other started. The contractions in her ass seemed unending. Desperate to catch her breath, she rotated her hips down, encouraging him to return his attention to her pussy. Lina watched as Mark licked two fingers and slipped them into her pussy.

"Finally, she thought, "fuck my pussy, fill me up."

She rotated her hips down to meet his fingers, urging them in as far as they would go. She felt his knuckles stretch her out as his fingers reached into her depths. His tongue returned to her clit, licking in circles. She watched as three and then four fingers pushed into her wet hole. He moved his hand in and out slowly, filling her, fucking her. Her fingers stayed at her nipples as she watched. His fingers pulled out, her swollen lips gripping them. Her hips rose to meet his hand as he slid his finger back inside her. He pushed until he met resistance, his knuckle grinding against the bottom of her clit, then slowly pulled them out again.

In and out, her face clenched in concentration., her eyes wide, watching his hand disappear into her spread pussy. She grunted each time he bottomed out. She felt her breathing synchronize with his pushes.

"Oh. fuck. That. Is. Deep," she gasped, "mmm, mmmm, mmmm, yes."

Her pussy stretched around his hand, gaping when he removed it. She wanted more, wanted to feel full, fuller. She imagined his whole hand disappearing inside her, fisting her insatiable tunnel. She felt her orgasm start, her pussy clamping down on his hand. He lowered his head to her clit and started sucking. His fingers pushed deep into her as she came.

"Oh god, that's it, fuck my pussy, fill me up, mmm, coming," she moaned.

Mark kept his fingers moving. His mouth stayed on her clit, licking and sucking as her arousal peaked. Her hips moved, coaxing his fingers deeper, wanting to be fucked until she passed out.

Her eyes flung open when she felt him remove his hand, seeing her abused pussy twitching as it drooled wetness onto the bed. Lina felt Mark move his fingers down to her ass, slowly slipping one inside. Her tight hole was lubricated with her recent orgasms, ready to accept the penetration. Eyes closed, she moved her hips in time with his fingers as she felt the first finger joined by a second and a third. Lina moaned gutturally as her ass opened for him. She felt his fingers stretching her ass as he had her pussy, filling her. A deeper, stronger orgasm started building. Lina gasped at the intensity. She opened her eyes and looked down.

"Holy fuck, I feel so full," she moaned, "Fuck me, baby, fuck me hard. I can feel a big one coming."

She grabbed her knees and pulled them back, surrendering her ass. Mark slid his fingers into her ass, pushing it in as far as he could. She grunted as he reached his knuckles. As he pulled out, her ass gripped his fingers, reluctant to release the pressure.

"That's it, baby, I am getting close again, fuck it feels good," she cried.

Mark thrust into her ass while sucking hard on her clit, her fingers pinching her nipples constantly. The sensation was incredible; her body tingled as the pressure rose, her eyes rolled back into her head. The frequency of his thrusts increased, his fingers pounding her ass.

"Fuck yes, I'm coming, holy shit, don't stop, yes, coming," she screamed.

Her ass contracted violently around his hand. Her pussy spasmed, spraying wetness down his hand, dripping onto the sheets. Her body curled spontaneously into a ball, overwhelmed by the intensity, her orgasm still playing out. Mark still fucked her ass. She thought she might pass out from the pleasure. Suddenly, she felt the emptiness as he removed his hand. Lina's ass and pussy both gaped wide open, red and swollen, her clit still hard and wet, her ass still contracting. She saw Mark stand on his knees and start stroking his hard cock. His hand was coated with her pussy juice making his hard length slick and wet. Lina rolled on her back, spreading her legs, fingers finding her clit, her other fingers spreading her gaping pussy.

"Come for me, baby, spray it all over my pussy," she moaned.

Mark's frantic strokes brought his orgasm quickly to a head.

Mark cried out, "Coming, coming now," as he began to spray all over her pussy and belly.

Lina felt the hot come land on her belly and breasts. She scooped up the come and rubbed it into her pussy. Rubbing it on her clit as her pussy contracted in another orgasm.

"Coming, oh fuck yes, coming again," she gasped.

Mark collapsed beside her. She rolled onto her belly and took his cock in her mouth to lick and suck the last of the come from it. Laying back, she snuggled her head into his muscular chest and fell asleep.