"You'd better stop now," she breathed. "Doug! Are you listening to me?"

Doug didn't stop moving. He pushed the head of his cock tighter into the seeping heat of her pussy. Her cherry was being pushed in. Robyn was breathing so fast by now she could hardly speak.

"Doug! Ohhh, don't, Doug! Don't!"

Doug kissed her on the mouth again, and though she was trying hard to make him listen, Robyn kissed him back hungrily. His mouth was hot and wet and when his tongue slid between her teeth, she bit down on it instinctively.

"Robyn, you're so pretty," Doug whispered, his cock thrusting against her delicate cherry. She felt each movement of his hips, each bump of his cock-head against her slippery pussy-lips. Her ass trembled and she moved convulsively. That tingling, itchy pleasure was so good it was hard to keep still.

"This is wrong," she babbled, trying one last time to make her brother listen to reason. "You've got to let me up."

"I want to fuck you, Robyn," Doug moaned, grabbing her wrists. He pinned them beside her head, while he kissed her mouth again. His back humped up a little as he drove his hips under and up. There was a sudden sting and Robyn opened her mouth to cry out. Only a sigh came out.

"No! You're hurting me! You're fucking me!"

"Relax! God, I'm not killing you." Doug burrowed his mouth against her neck. Robyn tightened her pussy, but already the head of her brother's prick was sliding into her cunt. She felt the soft flesh widen out, sliding around the streamlined shape of his cock.

"Ouch!" she whined, feeling the sting of her cherry being split. Split by the slick barb of her brother's cock! "Ohhhhh, Doug, you've got to stop right now!"

"Doesn't that feel good, Robyn? God, I've never done this before. It's so soft inside your cunt. And so hot!"

"No! Ohh, don't, don't, don't…"

"Relax. It doesn't hurt does it?"