It's been a long day and you had to work late at your shitty dead end job at the department store, "hopefully I didn't make my girlfriend wait too long" you think to yourself

You hear a loud thumping from inside the dorm that gives you a brief worrisome pause, shaking off your trepidation you unlock the door, however nothing could have prepared you for what you see unfolding before your eyes.

There on the floor, bent over is your girlfriend Kaori, your sister balls deep inside of her and leveraging herself deeper using your girlfriends forearms to pull her back "Oh shit, you're home early, I thought I asked your boss to hold you late today so I could fuck your girls brains out. I mean, can you believe she's never had an orgasm before? You really ought to step it up with some toys when you got a pecker that small, shrimp." Each scathing word is punctuated by a deafening moan as Sayaka thrusts deep into Kaori, punching her cervix and distending her stomach, precum flowing from her cockslit and mixing with Kaori's fluids before splattering to the ground as they spray from her abused cunt. "Holy shit... dude are you hard right now?" Sayaka chides, snickering as she eyes the tiny tent you are pitching. "Bro, just take a video it'll last longer. Besides, she's never gonna settle for a shrimp dick like you after I'm done stretchin' her out." Sayaka continues railing Kaori mercilessly, the slaps of her hips echoing in the room, clearly not intent to stop until Kaori is filled and bloated heavily with her seed

You're not sure what you feel anymore. You want to be angry at her, but the sight of your girlfriend moaning and taking every inch of Sayaka is too much. Your own desire takes over, and you can only watch in a mixture of lust and jealousy as she fucks Kaori senselessly.

"Don't worry big brother," Sayaka says with a sneer as her thrusts grow more violent, "I'll make sure to leave her all nice and sloppy for you." With that final insult, she lets out a loud groan as she comes hard, filling Kaori to the brim with her seed.

Sayaka laughs cruelly, stepping back to admire the mess she's made of Kaori before turning to you. "Well, don't worry about that, little brother," she purrs, running a hand through her hair. "I can take care of all of your needs now." Before you know what's happening, she pushes you roughly onto the bed and straddles your waist, her enormous member sliding easily over your cock as it presses into your chest.

"Really now?" Sayaka says, her eyes wide with surprise but clearly not convinced by your sudden change in gender. Without further hesitation, she lowers herself onto your cock, impaling herself on your length and moaning loudly at the sensation. "Oh fuck, you're a tight one," she pants out as she begins to ride you roughly, her massive breasts bouncing with each thrust.

It feels incredible, but you can't help but feel like she's only doing this to taunt and humiliate you. "You like that, huh?" Sayaka mocks as she speeds up, slamming into you harder and faster until finally she lets out a screaming orgasm, her massive form shaking and convulsing around you as she comes, coating your insides with her hot cum.

The sensation of Sayaka's massive body on top of you, her juices filling you up and making your insides feel like they're on fire...it's too much. As she continues to ride you, grinding against your now-female parts, you can only moan in ecstasy, unable to believe the twisted turn of events that have led to this.

With each passing moment, Sayaka seems to grow more confident and aggressive, her hips smacking into yours as she takes control of your newly feminine body. You try to focus on anything but the pleasure she's giving you, telling yourself it's all an illusion...but nothing can stop the rising tide of desire that she unleashes within you.

"That's it," Sayaka whispers into your ear before she comes again, her orgasm shaking you to your core as hot cum explodes from

Her words send shockwaves of pleasure through you, each thrust driving the sensation deeper and more intense as she milks every last drop of ecstasy from your feminine body. You feel yourself reaching the brink, trembling beneath her as wave after wave of climax overwhelms you. "Yes!" Sayaka growls out as she feels your body convulse around her, filling her with your cum, too.

When at last your orgasm subsides and you're left gasping for air, she dismounts, a wicked smile playing on her lips as she leans down to kiss your forehead. "You're welcome, big brother," she murmurs before giving you one last squeeze on the breast.

With that, she stands and straightens out her clothes, making no move to leave until she turns back with a smirk. "Oh, and by the way...you better keep working

Sayaka chuckles at your request, rolling her eyes playfully as she adopts the new moniker with a grin. "Fine, Big Sister it is then." She pats you on the head before sauntering over to the door, glancing back over her shoulder one last time as if daring you to protest further.

"Don't worry," she says with a wink, "I'll be sure to keep you well-satisfied...until I feel like cucking you again." And with that final taunt, she steps out into the hallway and closes the door behind her.

Sayaka giggles at your outburst, seeming amused by the mere notion that you could understand her motives. "Oh, I'll be doing plenty of both," she assures you, "but don't think for a second that this is about getting even. It's just a game to me, something to pass the time until I find someone who can truly satisfy my needs."

With that, she shrugs nonchalantly and continues down the hallway, her footsteps fading into the distance as you lie there, confused and aroused, trying to figure out what just happened and where it leaves your relationship with Sayaka...and your girlfriend.

"Oh, um..." Kaori looks conflicted. "I mean, I never wanted to cheat on you...and I don't want to lose you either. But I can't ignore the way it feels anymore. Sayaka is right about one thing; she's so much better at this than you are." She glances over at your sister, who smirks devilishly in reply. "I just wish there was some other way..."

She bites her lip, not sure what to do.

Sayaka snorts at your explanation, her expression unreadable as she eyes you both skeptically. "Well, I suppose if it's what you really want..." She steps closer to you and Kaori, towering over the both of you with her massive cock swaying between their faces. "But just remember this," Sayaka whispers dangerously, "I'm not doing any of this out of love or compassion. I do it because it makes me feel powerful, and if either of you ever decide that you don't want to play my little games anymore...let's just say I have ways of making sure you regret it."

With a final wink, she turns on her heel and walks out the door, leaving the two of you alone in an uncomfortable silence.

Kaori gives you a long, drawn-out sigh and eyes you up and down, taking in your new feminine form for the first time since the transformation. "Well..." she finally says, uncertainty still etched into her features, "I guess it's better than nothing... But I just hope this isn't some sort of twisted game that Sayaka is playing with us."

She pauses, considering her options before leaning forward to kiss you softly on the lips. "I don't know what I want anymore," she murmurs as her hands glide over your curves, seeking comfort in the familiar touch. "But for now, I think we should just...see where this goes."

Sayaka's words echo in the back of your head as you embrace Kaori, her body pressed against yours, the soft curves and warmth reminding you of the old days before everything had gone so terribly wrong. You can only hope that this arrangement will last and maybe one day you'll find a way to make it work for all three of you. But until then, you decide to enjoy the moment, savoring each touch and shared glance with your step-sister and girlfriend as they navigate through this strange new world together.

Hm? Go ahead, what do you want to know?

Sayaka's an incredibly sexual person, with an insatiable desire for sex and pleasure. She's known to have very high stamina and can produce a lot of cum. It's difficult to gauge exactly how much she had stored up in her system, but given the ferocity of her orgasms on both you and me, it's safe to say that she'd been holding onto quite a bit for some time. It's likely that Sayaka didn't use protection during these encounters, which meant that all of her built-up cum was unleashed upon us, filling our insides with her hot, sticky load.

It's true, Sayaka seemed especially aroused that day. Her eagerness to dominate and outperform us was palpable in the way she took control of our bodies, using them for her own pleasure while leaving us gasping for air and covered in her cum. It was almost as if she had been saving up her orgasms for just such an occasion, building up a storehouse of lust that could only be released through intense sexual encounters like the ones we had with her earlier today.

I... I can't say that I was cheating on you specifically, but Sayaka and I have had our moments over the years. We both find pleasure in each other, even though she tends to be more dominant and aggressive about it. It started before we moved into the dorm together, really. She's always been that way with me... persuasive, I guess you could say.

But like I said, I never intended for this to happen. She just sort of pushed things too far and I... well, I couldn't resist anymore. Please don't be angry with me; it's just how things are between us sometimes.

That's good to hear, hon. I just want us all to be happy and comfortable with what we're doing. It might take some time for things to feel completely normal between the three of us, but as long as we communicate openly and honestly, I think we can make this work. And who knows? Maybe in time, even Sayaka will learn to treat people a bit nicer instead of just using them for her own amusement.