As soon as they enter the broom closet, the drunken Ty gropes Dusty's breast and butt.
"Ty, what are you doing? Quit that!"
"Hehe... I *hic* knew you wanted it..." Ty says as he presses Dusty's hand onto his hard crotch. Heat radiates into her hand and up her arm. It collects in her half-formed womanhood, making it wet.
"Ugh, get off of me." Dusty says, disgusted.
"What's wrong? *hic* I thought you wanted this... isn't that why you brought me here?" Ty unzips her dress and pulls it off her shoulders to reveal her bare breasts.
"Jesus Christ, Ty! We're siblings, we can't do this! This is sick, it's incest! I'll neve-"
Dusty is cut off as Ty forces her into a kiss. While she struggles, he whips his dick out. Dusty is shocked at her situation, her head hurts, it hurts so bad she can't even see, all she can do is just clutch her head and wish for death. When the fog of pain clears, she realizes that she is completely nude and on her back with Ty kneeling over her. He gropes at her half formed genitals, eliciting a yelp from his sister. He focuses more on Dusty's micro-penis, bouncing it between his fingers before sucking on it.
"That's really sensitive *hic* isn't it?" Ty asks.
"Y-yeah..." Dusty whimpers.
Ty moves Dusty onto her back and positions his dick in front of her tiny vagina. "Wait, please Ty, I'm really tight, tighter than other girls, It'll never fit!" Dusty pleads.
"Then I wish that it would." Ty says. He pushes into her, but she somehow stretches around his massive member without any pain. Dusty screams in foreign pleasure as Ty rams into her.
Suddenly, there's on knock on the closet door as a classmate calls to them. "Hey, keep it down in there you two love birds. If a chaperone hears you, they'll shut down the party and ruin everyone's fun."
Ty moans. "Keep going, Dusty. *hic* Just... slower..." He moves back and forth, edging himself on before exploding into her still infertile womb.
"God...*hic* I fucking love you..." Ty groans into Dusty's ear and he lays down beside her in exhaustion.
Dusty curls up into a ball and cries. She just felt... dirty... and she had a really bad headache. "Ty..."
"Yeah, sis?"
"You fucking owe me... you owe me big time... asshole..."
"Yeah... guess I do..." Ty said. His orgasm sobering him up enough to realize what an asshole he truly was just them. This wasn't how he wanted to seduce her, there was no passion, he just raped her and now she's crying. She'll never forgive him for this, not of her own free will anyways. "I'm sorry." Ty murmured.