I ambled into the bathroom bleary-eyed and fumbled with the sink faucet. I rubbed cold water into my eyes and prepared myself for a much-needed day off. I sighed deeply and considered what PC game I was going to play first.

"Yeah you gotta see this fucking thing..." My thoughts were interrupted by muffled conversation trickling from my sister's room.

"...I don't know where he got it..."

Our bedrooms were connected by a neat little jack-and-jill bathroom, doors on opposing sides, so I could sometimes hear her thumping music or one side of her phone conversations faintly through the door when I was taking a piss. A small keyhole below the doorknob allowed a certain amount of sound to seep through.

"Yeah I'll find a way..." the conversation piqued my interest as I began to gather what she was talking about with her girlfriend. "He's fucking messy. He probably just leaves it lying out somewhere"

One corner of my mouth turned up.

"Yeah it's big," she said with a giggle. "yeah yeah I know what you like, you whore"

I shivered in delight.

She was talking to her friend about my cock. Rather, my dildo. My very, very realistic and "cum-filled" dildo.

The implications of their conversation began to materialize in my mind.

"I don't even know, girl. I always knew he was a sick little fuck. I just don't even care as long as we can..." Her voice trailed off as she began to whisper.

"Ok, I'll see you in a few," I could barely hear after a few moments of silence.

I could only make assumptions.

I left the bathroom silently, clicking the door shut behind me.

I looked over at my desk where the small black box sat.

My dick began to swell as my gears turned.

I looked at my bathroom door with hope: hope that I'd heard her right. hope that I was right about what might happen in mere minutes.

I popped open the small black box and pulled both of the glowing latex-like rings out as my plan began to materialize.

I quickly pushed my boxers down and my half-hard cock flipped past the elastic band.

Holding one ring in my flat palm, I slid the other one carefully over my thickening dick and reveled once again as my cock appeared in my outstretched hand.

I held it carefully and looked down at my balls. I thought about it for a moment and decided she wouldn't remember what it looked like yesterday, the stupid bitch. So I reached down and stretched the flexible material over my sack, watching my balls materialize off the side of my hand and hang from my shaft.

I shivered with delight.

I pulled my boxers back up and gripped my shaft gently, feeling my hand squeeze it. I grazed my fingertips over my smoothly shaved balls. I shuddered as it thickened further.

I went into the bathroom and shut the door behind me allowing it to click against the strike plate loudly. I wanted her to know I was in here. I had a plan.

I looked at my cock. I looked into the mirror and saw myself with my cock in my hand. I blushed with shame. I was truly embarrassed, but only for a moment.

I allowed a bit of saliva to well into my mouth and I spit on my tip audibly, glancing at the door to my sister's bedroom hoping she'd heard.

I hesitated for only a final moment before I pushed my tip into my mouth and sucked noisily. My knees nearly buckled when I felt the nubbly texture of my wet tongue glide across my extremely sensitive frenulum and my lips slip over the pronounced ridge of my circumcised head. I held it in my mouth as I flicked my tongue side to side against the sensitive skin under the head. It grew quickly and the head swelled in my mouth.

I sucked it loudly. I wanted to make sure she heard. I made sure to lewdly slurp with wet suction as my lips slipped over the ridge of my swollen head each time I slid my cock into my mouth. A sickly pop echoed off the bathroom walls with each thrust.

It felt incredible. It was gross. I accidentally glanced up at the mirror at myself. I saw my own lips wrapped around my shaft and my cheeks undulate with the disgusting movements of my tongue. I blushed fiercely, my cheeks flushing with redness as I looked away quickly in shame. I didn't stop. I continued my loud self-molestation with purpose.

Eventually, I decided that there was no way Jess couldn't hear me and I pulled my "dildo" from my mouth with a loud pop.

I unceremoniously threw it into the drawer on my side of the bathroom with a thud and shut it loudly. I left the bathroom and shut the door behind me.

A bit of panic shot through me as the realization of what I'd just done began to set in. If my assumptions were right about what I'd just heard Jess talking about, it means I'd just surrendered a part of myself to the whims of my sister and her cunty friend.

A knot formed in my stomach.

I turned around and reached for the bathroom door once again.

The doorbell rang. My hand flinched away.

I weighed the possibilities quickly.

I soon heard the sing-songy voice of my sister's bestie, Amber, from downstairs. That sealed the deal. Amber was just about as banging hot as my sister. Gorgeous face with luscious pouty lips, huge tits that spilled out of her sweaty sports bra when they came back from the gym together, big round ass cheeks, usually clad in tight form-fitting yoga pants. Equally cunty at times though.

I heard them both thump their way upstairs and past my bedroom door, excited whispers being passed between them.

Soon after, my sister stumbled into the bathroom from her side. I listened.

"Yeah, he was just in here with it." She half whispered, half giggled. "I heard his drawer- Yeah here it is. Oh my god"

The feeling of her delicate fingers once again wrapping around my sensitive shaft sent me falling into my desk chair and my eyes fluttering.

"Look at this fucking thing, dude," she whispered loudly.

"Holy shit. Why does he have this?" Her stupid friend giggled.

"I don't even know. It sounded like he was- EW It's all fucking wet!" Jess blurted.

The bathroom faucet hissed and I was shocked by the intense feeling of cold water being splashed across my shaft. The feeling of them both rubbing the length, the head, sliding their fingers across my balls while the cold water washed over my cock threatened to send my cum prematurely spurting into the sink.

The feeling was surreal. I reclined back in my desk chair with my eyes closed as I envisioned them both lovingly caressing my swollen flesh ten feet away from my body.

The raspy feeling of the towel was less nice, but it was brief.

They giggled and bounded back into her room, shutting and locking the door behind them.

I felt them fingering it with curiosity, tracing their fingers up and down the veins, around the ridge of the head, across my flared piss hole, along the smooth flesh of my sack. I was in heaven. I was still nervous. I wasn't sure what they were capable of. I was putting a lot of unspoken trust in their motivations.

I opened my eyes with realization and silently crept into the bathroom on wobbling legs. I knelt down at my sister's door and peered through to small keyhole. They were both on their knees in the middle of her room, bouncing with glee on the balls of their feet.

"I can actually feel it throbbing," Amber said quietly, holding it up, and looking at it with reverence.

"What, really!?" My sister grabbed it from her, my balls bounding to the side, and squeezed it, looking at it with thought. "Holy shit you're right. It's so fucking realistic. Look there's even precum inside that comes out when you play with it."

They ran their fingers across the tip and dragged the slick liquid around on the head. Each time one of them gripped it or fingered it with curiosity, my entire pelvis lurched with white-hot pleasure. The sheer taboo of the act only served to send additional burning jolts of bliss through me.

"Wait a second!" Amber spoke with realization. She grabbed my cock from my sister. "This ring..."

She glanced up at the bathroom door briefly. The keyhole was tiny, so she couldn't see me, but she looked right at me like she suddenly had x-ray vision.

"This is…" She stopped herself. She glanced at the door one more time.

My stomach dropped. Realization washed over Amber's face and her eyes widened. Panic washed over me.

"This is what!?" My sister grabbed it from her once again.

"Um... Nothing," Amber mumbled. "I mean, this is awesome. What an insanely realistic dildo your bro found."

A smile slowly materialized on one side of Amber's gorgeous face. It almost looked sinister.

Jess sat for a few more moments, manipulating her new toy and touching each erogenous zone with fascination. The intensity of the situation pushed out all shame and hesitation I had right then as a silent understanding was made between Amber and I.

I was still confused as to why she didn't pull the curtain back from the whole charade and expose her friend's perverted brother, until I heard her next words.

"You know what?" She spoke with darkness in her voice. Jess looked up at her. "You should taste it."

"Oh my gosh, you read my mind!" Jess said excitedly.

That is when I realized that Amber was just as fucked up and perverted as me. She actually wanted to see her friend suck her own brother's dick. It was disgusting. My stomach lurched with anticipation. Fear attempted to push into the corners of my mind. My breath quickened and shallowed. I wanted to stop her. She was my sister. I wasn't going to stop her. Maybe I was just telling myself that I still had enough self-respect and morality to end this. A coping mechanism. Maybe I should-

My thoughts were interrupted by the luxurious feeling of my sister's tongue dragging slowly across my dripping tip. I watched as she gathered the precum into her mouth, maintaining eye contact with Amber, a smile at the corners of both their mouths. The feeling sent my cock twitching fiercely in her hand. I reached down impulsively where my cock should be and nearly moaned as my hand cupped my flat pelvis and the rubbery ring. Her eyes opened with surprise and joy.

"Oh fuck it twitched!" She moaned as she swallowed my slick offering. "And this stuff tastes exactly like real precum!"

Amber's eyes glossed over with lust and whorish abandon. She should stop her friend. She should tell her she's licking her brother's cock and save her the shame.

Instead, she twisted her thighs together and sighed sweetly.

Jess looked at my cock once again with reverence, eyes glowing gleefully. Without hesitation, she began licking up and down the veiny sides, occasionally sliding down to glide across the sensitive underside and down across my balls. Amber continued twisting her thighs while she watched, smashing her clit between her thighs. She leaned forward and caught a big bead of precum with her tongue before it dripped and began tonguing my sensitive piss hole while my sister continued licking up and down the shaft. My stomach twisted with intense pleasure as I watched.

I wasn't going to last long.

Amber looked over at the door one more time, smiling at me, toward me.

"Where's your brother?" She asked Jess as she swallowed my precum.

"I dunno playing video games in his room like usual, who fucking cares?" Jess spat, continuing to slobber on the sides of my cock.

Amber bit her lip sexily as she watched Amber slurp on my "dildo." With lust-glazed eyes, she reached down into the front of her yoga pants toward her pussy.

"Hey wait what the fuck?" Jess shot Amber a panicked look.

"Don't worry. It's just... I didn't realize how good you were at sucking dick. It's hot to watch..." Amber grinned at her friend. "Pretend I'm not here." She sighed the last words as her fingers undoubtedly met their soaking target.

"You really are a slut aren't you?" Jess laughed. Amber flashed her a mischievous grin.

"Didn't you say that thing can cum?" Amber inquired, moaning softly.

"Hell yeah I found Jay playing with it the other day and I grabbed it off his desk." Jess recounted. "The thing started squirting all over me as soon as I touched it."

"Ooooh fuck" Amber's hips thrust involuntarily at hearing that. "It came on you?"

"Yeah, it was pretty fucking hilarious. I guess I touched it in the right place or something. Must be a button on here that releases it" Jess giggled, beginning to slurp on my cock again, sending it into a frenzy of twitches.

"Did you swallow it?" Amber moaned.

"Mmm hmm" my sister grunted around the sides of my cock. "It tasted like real cum too, like really tasty cum"

Amber moaned with the vision of her friend swallowing her brother's cum. I could hear the sickly slurping sound of her fingers sliding in and out of her cunt slowly.

"You're fucking gross, you know that?" Jess laughed at her friend as her room filled with the sound and smell of wet pussy.

"Tell me you're not getting wet." Amber challenged her, her eyelids fluttering as she watched the incestuous act in front of her and grew closer to her own release.

Jess smiled at her friend. She reached into her shorts, the squelching sound of her own pussy being invaded by her fingers could be heard. She pulled her hand out and it positively glistened with slick pussy juice. She pulled her fingers apart and thick tendrils of the slick liquid stretched and draped between them. She wrapped her soaked fingers around my shaft and glided her copious pussy juice up and down while smiling at her friend. "It's not my fault I love sucking cock, okay?"

My eyelids drooped at the filthy sight. I was going to cum.

Jess continued pumping her pussy juice up and down my shaft and slid her lips completely over my bulbous cock head. She started sucking and stroking at the same time, my balls bounding backward and forward with each thrust.

Amber reached out and grazed her fingertips along the bottom of my shaft and flashed one final smile at the bathroom door knowingly.

"Make him cum, Jess," Amber said with a tight throat, her own breaths and moans coming quicker and more urgent. Jess flashed her friend a lusty look and smiled around my cock slightly. "Make that fat cock shoot down your throat like a good little cum-guzzler"

Amber was moaning by this point and her hips were twitching, her eyelids fluttering.

She reached up and pushed at the ring with force, smashing my throbbing head tightly against my sister's throat.

"Do it, slut" Amber ordered, no longer smiling.

Jess understood what her friend meant. She tilted her neck back and stuck her tongue out, drool and both of our fluids dripping from her mouth.

"Gaaaaah," Jess gurgled around my cock as she opened her throat and allowed Amber to slide the remaining 4 inches of my prick into her face, completely cutting off her air. I felt her tongue press into my balls as she bottomed out on me. Her tight throat wrapped around my spasming head and sent me over the edge.

My orgasm took me. My vision blurred. My cock began jerking wildly and squirting hot jets of cum into my sister's throat repeatedly. My hips involuntarily thrust outward with each wave of pleasure. I watched my sister take it, her neck slightly bulging with each orgasmic contraction I experienced. She didn't gag one bit. I was barely able to contain my moans.

Amber on the other hand did not contain her moans. She threw her head back and cried out. Her hips bucked uncontrollably into the air and her big tits bounced in her tight tank top. A torrent of girl cum sprayed audibly into her yoga pants with each thrust. She was cumming hard, grunting and whining with each wet spurt that ejected from her cunt.

Jess's throat contracted around my cock as she swallowed every thick rope of cum I gave her. She gurgled sweetly as she took it.

After what felt like fourteen or fifteen hot jets of nut, Amber took her hand off and allowed Jess to slide my cock out of her throat. She kept the head in her mouth though and kept sucking and swallowing as my orgasm weakened and the last few weaker jets of cum pulsed from my tip.

"Fuck!" Amber grunted as the last few aftershocks of her orgasm sent her shuddering. "That was fucking intense!"

"Yeah, it was" Jess gurgled. My still-twitching cock fell from her face into her lap, the smooth feeling of her bare thighs comfortably cradling me through my final throes of climax. "That was hot as fuck."

They both gasped and caught their breath, huffing at each other, spent.

Jess wiped her tears away and limply leaned back against the edge of her bed.

Several moments passed as Amber basked in post-orgasmic bliss and Jess caught her breath.

"Listen," Amber sighed as she slowly stood up on wobbly legs. "I gotta go, but find out where he keeps that thing. I wanna try next time." She flashed Jess a grin. Jess giggled.

Amber waddled out of the room in her soaked yoga pants and shut the bedroom door behind her. I heard her pad down the hall.

I heard my bedroom door open through the closed bathroom door behind me. I bolted upright in panic. Footsteps approached the bathroom and stopped at the door.

"Did you like that, you sick fuck?" Amber's voice came from my bedroom. A smile in her voice. I stayed silent. "Don't tell her. I have plans for you."

There was no smile in the last words, only resolve. I wasn't sure whether to be excited or afraid.

She giggled as she walked away and closed my bedroom door with a click.

I shuffled out of the bathroom silently...