Contains stepsibling rape!
Derek couldn't take it any more. He angrily threw his book at the wall. Yes, he'd actually been reading (reading!) in a desperate attempt to occupy his mind. But it was no use.
Who did she think she was, anyway? Prancing around in those skimpy little tank tops and those tight pants, parading her flawless body right in front of him, practicing her dance routines where she knew he could see, showing off her flexibility, sure, but so, much more - the look on concentration on her face as she swivelled her hips, the sheer sensuality of her every movement, the way she looked when she was sweaty and heaving...
... she was asking for it.
"Hey, let me call you back, Em," Casey said into the phone as Derek burst into her room. "What do you want?" She was eyeing him suspiciously.
Derek didn't answer. He turned to lock the door behind him and advanced toward her. Casey, worried a bit by his intensely predatory demeanor, crawled backward on her bed, trying to keep some space between them. Derek grinned wickedly as he kneeled over her. "You're creeping me out, Derek," she said unsteadily.
He grabbed her around the waist and dragged her away from the headboard she'd been sitting against. Lying on top of her now, he held both her wrists in one hand and placed the other on her bare thigh. She'd worn a short skirt today. She wanted him, he was sure, and this was her way of admitting it.
He kissed her before she could scream. She tried to wriggle free as he hooked a finger on the waistband of her panties and worked to remove them. It wasn't easy, as restraining her arms was proving to be an absolute necessity.
"Stop fighting it, Case," he growled, his lips brushing hers.
"Please, no. Don't do this, Derek," she whimpered as he tossed her underwear aside.
"No? You've been asking for this for so long. You've been begging me to fuck you. You're a smart girl, Case. You knew exactly what you were doing," he said breathlessly, unfastening his jeans. She was crying now, and struggling against him harder than ever.
"Why do you have to make it like this?" He raised her skirt and forced her legs open with his knee. "I could have made it so good for you, Case. But now it's going to hurt for sure, and you won't let me make it any easier. I didn't want to do it this way."
His eyes full of regret, Derek plunged into her. She was sobbing, but that didn't prevent her from screaming as he slid all the way into her tight pussy. She bit her lip and turned her head as far from him as she could while he moaned and thrusted. Soon it would be over, she told herself. The pain would stop and he'd go away. Soon.
Derek was having trouble containing himself. He'd imagined this hundreds of times, but none of it had come anywhere close to the real thing. Finally, she was his, and it was glorious. Too quickly, it was over, and his arms gave out as he came inside his stepsister.
He closed his eyes and buried his face in her hair. "I love you, Case," he muttered.
Thanks to some helpful feed back, I will probably be revamping this, so suggestions are welcome!