"Oh, honey, you're just tired of lying round doing nothing, aren't you? Now, let me just rub that knee of yours and see if I can't make it feel better all by myself."

Cheryl leaned across the bed, her enormous tits jiggling in her uniform top as she gently started rubbing her kid brother's knee. Kenny sighed pleasurably, enjoying his big sister's soft touch. Soon, his prick started getting stiff, swelling in lewd little jerks on his thigh.

"Oooooh, you like the way big sister rubs your knee, don't you, Kenny?" Cheryl giggled. "Something big and juicy looking sure is getting stiff in a hurry!"

Kenny just blushed sheepishly, saying nothing as his cock grew completely hard, throbbing stiffly over his navel. Kenny was slightly built for his height, and it surprised many to learn how well he could hold his own on the football field. What was even more surprising, Cheryl felt, was the size of his cock. The teen's cock was simply enormous; a long, fat fucker that Cheryl adored to suck and fuck. No matter how many pricks she sucked, she knew her favorite prick of all would always belong to her little brother.

"Maybe your knee isn't the part of your anatomy that really needs attention."

Cheryl stopped rubbing his knee, slid her right hand up and wrapped it firmly around the blood-beating root of his huge, quivering pisser. Kenny groaned as his big sister started beating his meat for him. He settled low on the bed, spreading his thighs, dazedly watching her glide her skilled fist up and down on his bloated fucker.

Cheryl had started sucking on her kid brother's cock shortly after his eighteenth birthday. Only a few weeks had passed since the deaths of their parents, and she supposed the shared, hysterical need for emotional support had driven them into each other's arms, and had broken down the psychological barriers against incest.

It had been one night while tearfully hugging her baby brother that she'd felt his enormous hard-on throbbing against her thigh. With her natural hunger for sucking pricks and swallowing cum, Cheryl had automatically taken Kenny's prick out of his pants for a long, loving cock-sucking that very night.