Belinda began to nurse on his knob voraciously. Her cheeks hollowed inward as she sucked and her lips turned outward, collaring his stalk below the crown. His balls rested on her tits and his long cock-rod stood between them like a pipeline connecting his cumbags to her mouth.

Belinda turned her face, screwing her mouth around on the head of his prick. Her tongue was bathing the underside of the flaring cock-meat wedge. Tommy had no frame of reference, but he could tell that his sister was a talented cocksucker. If it was true that she only gave head to guys that she liked, she must have liked a lot of guys.

He began to fuck into her face, shoving more of his stalk through the oval of her lips.

Her head jumped down to meet his cock as he humped it up into her greedy mouth. Her lips distended, pulling on his stalk as he withdrew. Her saliva streamed down his prick as she nursed on the head.

He jolted ball-deep into her maw.

"Unghhh!" she grunted, as his smoking-hot cock-head pumped into her throat and his cumbags ballooned against her chin. Then she drew back up, sucking through every thick inch and sighed, "Ummmmm!"

She drew her mouth off him and licked his knob some more, then fed it back into her lips.

Pre-cum was starting to seep from his pisshole now. It was even more delicious now that she was getting it straight out of his cock. He was so hot that she thought his prick might blister her tongue.

She whimpered down his prick, lips moving like a torch singer caressing a meaty microphone.

"Cum in my mouth, Tommy slime on my tongue. Ooooh – I'm hungry for your jizz, brother!"

She dove down as if she were ducking for apples in a barrel, gorging on his delicious cock.

She was frigging her pussy frantically, licking her cunt-juice from her fingers and palms, pretending that it was her son's spunk and her daughter's, too.