"It never made Hattie Fowler sick and she sucks cocks all the time."

Julie licked her lips and gazed down at the head of Bud's cock. Slowly, she lowered her mouth to it and kissed the dark blue flesh where it flared out. Bud dropped back on the bed and moved his hips gently, moaning with pleasure as Julie's tongue began to caress him once again.

"Ohhhh, sis! Ohhhh, you know how to do it!"

Robyn had put a hand down to rub her cunt now. Her pussy was so wet that she was afraid it might be leaking through her panties and her shorts. She snaked a finger under the elastic and pushed between the hot lips of her cunt. Moving her hips forward and back gently, she began to rub her clit.

"Suck it all the way," Bud said from the bedroom. Julie made slurpy noises as she tried to get as much of his cock into her mouth as she could.

"Mmmmmuuuhhh!" she moaned.

"God, Julie, why don't you let me fuck you?"

"How much?" Julie said, popping her mouth free as soon as she heard her brother ask.

"How much? God, I gave you some money last week, didn't I?"

"How much?" Julie repeated, not changing her expression. She pushed her blonde hair back from her ears. Bud took a big breath and squared his broad shoulders as he sat up.

"Five bucks. It's all I've got."

"Have you got a rubber?"

"Yeah, bought a fresh pack yesterday." Robyn was listening to all this with her eyes wide, her mouth hanging open. Again, she had the urge to flee this shocking scene. Her cunt tingled so thrillingly though that she couldn't move. She watched, peeking carefully through the partly open door. Julie had skinned off her top and was wiggling out of her shorts. She skinned her panties down next, her pert, boyish ass quivering as she jumped onto the bed.

"Lick me first, will you?" the cute blonde asked her brother. "It made me nice and wet when you did it that other time. You go in easier that way."