As Jack, a high school athlete, vigorously worked out on the weight bench, he couldn't help but feel pity for his aunt Rachel. She was standing next to him, huffing and puffing, clearly out of shape.

"Why am I doing this?" Rachel thought. But then she heard the voices in her head. "Rachel, you are forty, you are out of shape and no man is going to ever want you again if you don't do SOMETHING." So when her jock nephew Jack offered to help her get started working out, she begrudgingly agreed. But this sucked! This was so hard! It was like Jack was trying to kill her. OK, maybe not THAT bad... but still.

Rachel had been married for five long years. She and Jimmy had met at a bar. And even though it was totally not her style and was against her personal values, she let Jimmy take her home that night. And oh, what a night it had been! Rachel had never had sex like that. No one had ever made her feel like that. What she didn't recognize then was that Jimmy was a sex addict and a domineering partner. And while that was really good for what went on in his bedroom, it did not turn out to be good for their marriage. After forgiving him on the three prior times she knew he cheated, he eventually chose to walk out for someone who looked more like a porn star. The experience had left her feeling insecure and sexually dormant.

All of that had happened when Jack was little. He had no idea why she turned out the way she did. He just thought she was fun and funny. And when she said something about wishing she was in better shape, he offered to help. And so here they were...

"That was a good set of burpees, Aunt Rachel. You are doing great!" Jack encouraged her. She appreciated the kindness but still felt like she might die. "Take a break, and after, we can do some crunches," Jack said in between lifts of the bar he was under.

Rachel grabbed a quick drink and, upon returning, found Jack arranging a mat on the floor. "Here, Aunt Rachel, lay right here, and I will hold your feet."

She lay on the mat, and her ample chest was spilling out of her sports bra. Jack couldn't help but notice how huge it looked in her workout top. He had always been curious about her breasts ever since he was little. He tried not to stare, but he couldn't help it.

"Now, just lift your head and shoulders up slowly, and then lower them back down." Jack guided her. As she lifted her head, her breasts pushed against her lycra top, giving them an even more pronounced shape. Jack felt a stirring in his pants. He forced himself to concentrate on her movements.

As she lowered herself back down, Jack tried not to look at her chest. But with his eyes lowered and his hands on her feet, he almost choked when he suddenly noticed she was showing a serious camel toe in the tight spandex shorts.

Rachel had seen his glances at her chest. And had seen him flush. It felt odd. It took her a minute to recognize what she actually felt was a small jolt of arousal at being admired by a man. She had seen him flinch when he looked away. But didn't realize what he was seeing between her legs from his position at her feet.

"You know, Aunt Rachel... if you ever want to work out in the mornings, I could always come over and... help..." he said, trying to keep his voice calm, his eyes laser-focused on her crotch.

Rachel smiled, feeling flustered. "Oh, um... I... well... I mean..." she stammered, her face reddening. She knew what he was implying. And she had to admit, the thought of working out with her nephew every morning did have a certain appeal. He had offered to get her started but now offered to come over every morning. It wasn't like she was some prude or anything. And she wasn't blind to the fact that Jack had grown up to be a very attractive young man.

But she also knew that there was a line between being fit and healthy and using one's body to seduce others. And even though Jack was her nephew, she didn't want to give him the wrong idea. In fact, BECAUSE he was her nephew, she didn't want to give him the wrong idea. But still, it did sorta feel nice.

"I appreciate the offer, Jack," she said, clearing her throat a little, "But I think I should probably work out on my own for now. You know, get used to it before I bring someone else into it."

He smiled, nodding, but unable to look away from her crotch. "Yeah, that makes sense. I mean, I just want you to feel comfortable. You don't have to worry about me being a distraction or anything."

"I appreciate that, Jack," she said, her voice softening. She shifted slightly, feeling the heat rising in her cheeks. "And I promise, I'm not afraid of a little sweat or hard work. I just need to get back into the swing of things."

He nodded, still not looking away. "I understand. And if you ever do want me to come over, I'm here. I mean, if you want the company or someone to spot you or whatever. My mom is totally cool with me being over here. She said she worried about you being alone so much."

Rachel smiled, feeling guilty. "Oh, Jack. I'm not that bad. I do enjoy my solitude. And I appreciate your offer, I really do. But I think I'm better off on my own for nowwww OWWW!!" Rachel screamed while clutching the back of her right thigh. "Cramp cramp...oh my GOSH!"

Jack quickly moved to her side. "Are you okay, Aunt Rachel? Do you want me to...?" He trailed off, unsure if he should massage her or not. "Lay back, let me lift that leg and stretch your hamstring. It will help."

Rachel did as he said, lying back on the mat with her leg stretched out. Jack still at her feet, carefully lifted the leg, higher and higher, pushing it toward her chest. It took some effort, and Jack was leaning into her leg a little. He slid his hands under them, massaging her thigh. His touch was firm and confident. She couldn't help but notice the vulnerable position her body was in, with her thigh over his arm, lifted high, his body mostly between her legs. She was mortified to feel a sensation she hadn't felt in years: her nipples crinkled up and stood out. She was grateful to be on her stomach.

"That's it," he encouraged her, "just relax. I've got you." His voice was soft, reassuring. His touch was gentle, almost reverent.

Rachel closed her eyes, letting the sensations wash over her. The feel of his strong hands on her leg, the weight of his body against hers, the warmth emanating from him. It was intoxicating. She wanted to tell him to stop, that she was his aunt, that she shouldn't feel this way. But the words caught in her throat. For now, they both hid behind the fact he was helping her fix a cramp.

He continued to massage her leg, occasionally gliding his thumb across the sensitive skin behind her knee. The muscle slowly relaxed beneath his touch, and the cramp began to ease. When he finally released her leg, she sat up, grateful for the reprieve. "That was quite a cramp, Aunt Rachel. I know we got it to stop, but if you don't want it to come back in a minute, you ought to let me massage it out. That whole muscle needs loosened."

Rachel hesitated for a moment, feeling the warmth spreading through her thigh. She glanced down at Jack, at his earnest expression, and knew that she couldn't resist. "Well, I suppose it couldn't hurt to try. Just be gentle, okay?"

"Of course. Roll onto your stomach. Hey, do you have any massage oil or anything like that? This works so much better with some oil. I could use cooking oil if you don't have anything else."

Rachel thought for a moment before blurting out, "I...I actually have some massage oil. I use it for my...um...my personal use." She blushed, feeling embarrassed to admit that she owned such a thing. "I could...I could go get it for you," she stammered. She started to rise, but Jack gently held her down.

"Don't get up. That cramp is just waiting to return. Where is the oil? I will grab it and another towel," Jack said with some sternness in his voice.

Rachel nodded, feeling a little embarrassed. "Um...it's in the closet, on the top shelf. There's a...a bag of towels there, too." She watched as Jack climbed to his feet and walked over to the closet, his movements graceful and confident. He bent down, reaching up to retrieve the oil and towels. As he stood back up, his shirt rode up a bit, revealing the defined muscles of his back. Rachel couldn't help but stare, admiring his strength and athleticism.

Jack spoke over his shoulder, "This is ummm... I just... I don't want to get oil all over those spandex shorts and ruin them. Can you just... maybe peel them off and lay a towel over the area for privacy? I can do it for you, so you won't cramp up again if you want."

Rachel hesitated for a moment, feeling her face flush even hotter. "I...I don't want to put you out or anything. I mean, I don't want to embarrass you or make you uncomfortable..." She trailed off, feeling more and more awkward.

Jack turned around, a look of amusement on his face. "Aunt Rachel, you're not embarrassing me. I'm just a guy, remember? I've seen a woman in a bikini before. Besides, it's not like you're naked or anything." He paused, his expression growing more serious. "And I really don't want you to cramp up again. Just trust me. I promise I'll be discreet."

Rachel nodded slowly, still feeling a bit unsure. She hesitated for a moment, laid her head back down, and closed her eyes. She felt him lay the towel over her rear end, and then his hands slide under it, reaching for the waistband of her shorts at her hips. They both seemed to stop breathing as he slowly pulled them down, Rachel lifting her hips to allow them to slide off.

She could feel his eyes on her body as she lay there, partially exposed from the waist down. For whatever reason, it felt like he had chosen a small hand towel to cover her. It was a strange sensation, feeling so vulnerable, but at the same time, something was thrilling about it. As his warm hands returned to her legs, he began to massage her thighs, kneading the muscles with expertise. He moved slowly, methodically, his touch firm but not unyielding.

The oil felt warm on his hands, making them slippery. He was kneeling between her knees, forcing her legs a little more open than she was comfortable with.

He began to massage her inner thighs now, starting with the front and then moving to the back, squeezing and kneading the muscles with a practiced ease. It felt so good, so good to have someone touch her in this way. She felt so...so feminine and desirable. It has been so long.

As his hands moved higher, she tensed, unsure of what he was going to do next. But when he reached her hip, his touch was gentle and reassuring. He massaged the side of her hip, up and down, working out the kinks and knots of muscle. Then, he moved even lower, kneading the soft flesh of her buttock. The pressure was firm but not painful, and it felt wonderful. She was struck by the memory of her ex-husband groping and mashing her cheeks years ago in a similar way. And she realized with shame that she was becoming aroused. It has been so long, she had forgotten what a powerful feeling it was. So impossible to ignore.

Her breath quickened, and her body began to respond to his touch. Her nipples hardened again, and she felt a dampness between her legs. She wanted to reach down and touch herself, something she hadn't felt in years.

Jack seemed oblivious to her arousal, continuing to work his magic on her body. His hands glided over her flesh, the oil making him even more slippery as he moved. He massaged her inner thighs, squeezing and kneading the muscles until they felt warm and pliant. Then, he moved even higher, his hands cupping her buttocks.

"It's important to get the surrounding muscles to relax, " he quietly said, his voice shaky. Are you ok if some oil gets on your ummm.. your panties?"

Rachel nodded, feeling her cheeks flush. She couldn't believe she was in this position, feeling so exposed and aroused. "Yeah...that's fine," she managed to say.

Jack took this as consent, and his hands moved higher still, cupping her buttocks over her panties. She gasped as his warm, slippery fingers slid under her panties and began massaging a cheek. This was not what she meant... but she didn't know how to stop things now.

His touch was firm but not rough, and his fingers moved with a knowledge of her body that made her shiver. It felt so good, so wrong, and she could feel herself growing wetter and more aroused with each passing second.

Jack massaged her bottom with expertise, his fingers sliding under the fabric of her panties and gliding up and down over her sensitive flesh. She arched her back, unable to contain the moan that escaped her lips. He was making her feel things she hadn't felt in years, things she thought she had forgotten how to feel.

As his touch became more intense, she felt herself growing closer and closer to the edge. She wanted him to touch her, to make her feel even more. She wanted to beg him to stop, but at the same time, she never wanted him to stop. She started to worry that her arousal would become obvious... would he smell it? Would she get so wet that her panties failed to hide it? She should thank him and send him home before things got out of control.

But before she could gather the courage to speak, he moved back to her upper thigh. He was massaging the hamstring again, but the side of his hand felt like it was pressed firmly against her panty-covered sex, rubbing against it as the rest of his hand innocently worked the muscle.

Rachel bit her lower lip, feeling a tingling heat pool between her legs. It was like his hand was a live wire, sending sparks of desire coursing through her veins. She arched her back, pressing her sex harder against his hand, wanting more, needing more.

Jack seemed to sense her growing arousal, and his touch became even more focused on her lower region. He silently slid his hand lower, cupping her sex through her panties, his thumb rubbing circles against her clit. The sensation was exquisite, and she let out low grunt, her hips bucking involuntarily against his hand.

He continued to massage her, his fingers moving in an almost frantic rhythm. Her body tensed, and she felt a wave of pleasure wash over her. She bit down on her lip, feeling the orgasm building within her, threatening to explode out of her. She wanted to thank him, but the words were lost in a moan as she came, her body shuddering beneath his expert touch.

When the sensations finally began to subside, she opened her eyes, wanting to see the expression on his face. He met her gaze, and for a moment, she thought she saw a flash of desire in his eyes. But it was gone almost immediately, replaced by the calm, professional demeanor he'd worn since the beginning.

"How do you feel?" he asked, his voice steady.

Rachel slowly came back to reality, feeling a blush creep up her neck. "Um...that was...that was amazing. Thank you, Jack. I feel wonderful." She cleared her throat, hoping he wouldn't notice the slight tremor in her voice.

He smiled at her, nodding. "I'm glad I could help. Now, let's get you back on your side and see if there's any remaining tension we can work out." His voice was back to its calm, almost professional tone, but there was an undercurrent of warmth that made her heart race.

As he helped her turn back over, Rachel couldn't help but wonder what had just happened. It had been... amazing. She'd never experienced anything like that before. Was it just her imagination, or had Jack actually enjoyed it too? The thought made her blush even deeper. She had just orgasmed for the first time in YEARS...at the hand of her sister's son. She knew she would feel shame later. But for now, she just enjoyed the glow of pleasure centered between her legs.

She could see Jack, standing now, wiping his hands on a towel. He had a large lump in his shorts and looked flushed. She quickly closed her eyes again so he wouldn't see her looking.

"Alright, Aunt Rachel, I think that should do it. Why don't you lie there and relax for a few minutes? I'll go put the towels in the hamper, and then we can call it a day." His voice sounded a little distant as if he was trying to keep their interaction as innocent as possible.

But then, with some uncertainty, he added, "We probably should make sure for a while that I am your workout buddy. It is likely that thigh cramps up again."

Rachel opened her eyes, feeling a mixture of embarrassment and confusion. Was he... asking to do this again? She swallowed hard, not quite sure how to respond. "Um...well...I mean, I don't want to be a bother..."

Jack...