Alexis found herself unable to resist. Her virgin mind, unacquainted with such powerful sexual desire, could do little to fight against it. With each passing second, the ever-increasingly horny girl came closer and closer to giving Quinn the titty-fucking her massive bust deserved. It certainly didn't help that her cock had reached full mast either. It fought against the spandex, creating an uningnorable seven inch bulge that would be impossible to hide. Understanding that there was no turning back, she figured that she might as well have fun with it.
"Excellent news, everyone!" she announced as she sauntered into the room, hips and cock swaying playfully from side-to-side. "I figured out just what the game did to me."
"Hmm, what do you me-" Ryan cut off as his eyes came into contact with the out-of-place bulge. "I-is...that what I think it is?"
"Oh, it is, dear brother. Say hello to my brand new cock!"
With theatrical timing, Alexis yanked her black spandex shorts down, allowing her knotted cock the freedom it deserved. It popped forward, now unrestrained, swaying again from side to side. Ryan, already bothered by Quinn's exposed chest, immediately turned from Alexis's nudity, unable to come to terms with what he was seeing. Cosima, on the other hand, had the opposite reaction; she could not take her eyes off. The back-and-forth motion had hypnotized her, grabbing her full attention. Alexis couldn't help but chuckle at her step-sisters face.
"Like what ya see, Cosima? I'd be glad to give you a 'free tour', but first I gotta teach Quinn here a lesson about bumping into me."
"Wait, what exactly do you mean?" Cosima asked, breaking out of her trance.
Alexis ignored her, too caught up in the moment to even care to give a response. She knelt above her dazed little sister, straddling her hourglass figure. Gradually, she brought her cock lower and lower, as if to tease the unaware girl. Finally, when the tip of the member had reached the open gap below the over-stretched bra, Alexis struck. She shoved her hips forward violently, jamming all seven inches of her member into Quinn's tight cleavage. Ripples of ecstasy tingled through her cock as it collided with the doughy flesh of Quinn's breasts. She let out a moan of pure pleasure, but it was not enough. She wanted more.
"My goodness, this is what it feels like to have a cock? I wish I could have gotten this sooner!" she scream. "I need more, more!"
Avid to increase the pleasure further, she dug her hands into her little sister's massive mounds, pressing them together forcibly. The sheer force of her grope sent a light stream of milk squirting from her swollen nipples. Quinn's mind, once oblivious to the whole matter, finally had had enough. She regained enough consciousness to groan in pleasure, though not enough to do much else. Ryan and Cosima were at a loss as well. All they could do was exchange awkward glances, unsure of how to deal with Alexis's forceful fuck.
Emboldened by Quinn's inaction, Alexis pressed on. Her hips began to rock in earnest, pumping her cock in and out of the opening at a brisk pace. It was the most pleasurably thing she had ever felt, overwhelming her mind in a way she had never experienced. As she edged closer and closer to coming, her groping and trusting grew in vigor. She was like an animal, consumed in pure lust.
But like all good things, it soon came to an end. Though new to the male sexual anatomy, Alexis was well aware of the mounting feeling that was spreading through her cock. Not wanting to cover her sister in her seed, Alexis grabbed for the nearest object in which she could blow her load. That, it turned out to be, was Rachel. Without thinking, she snapped at the milk-soaked satin undergarment, tearing the strained bra in two. Holding the right half, she brought it to her tip just as the pleasure became to much. A torrent of semen came rushing out of the rod, coating Rachel in her warm seed. A small bit missed and landed on Quinn's chest, though both girls were too out of it to really care.
After blowing her entire load, Alexis collapsed to her side. As good as it felt, she was totally exhausted. The three sisters lay side by side, each virtually unconscious. Ryan and Cosima were the only two still lucid after the whole affair.
"Well, well, well." The game said, breaking the awkward silence. "Isn't it funny? Player Rachel thought she was safe as a bra, and look what happened. Worn by a girl too busty for her size, lactated on, came on, and finally ripped! What a ride."
"Is Rachel going to be alright?" Cosima asked.
"She'll be fine. Might be a little upset at her sisters, but she'll be returned to normal at the end of her turn. Now then, speaking of turns, I believe it is your turn, Player Ryan."
After what had happened, Ryan was understandably concerned about moving forward. The damn game had turned his closest sibling into a sex crazed maniac, his other sister into a walking milk-slave, and his other sister into a bra. Nevertheless, he grabbed his orange token, fearful of the consequences of not playing. Like all the others, he placed it at the start and rolled the die, getting a one.
"A one, eh? Not exactly a good start, though that puts you on..."