With a deep, throaty wail, Karen smashed her cunt hard into her son's face, his cock deep in her mouth. Her naked body trembled, then shuddered. Her orgasm was tight, very hard. The convulsions of her hairy cunt around his buried tongue made Robbie stab hard and fast, squeezing her ass and putting her pussy as far into his mouth as he could, wanting to make his mother come better than ever. Hot juices ran over his face and down his neck. His breath seared the pucker of her asshole.

Karen came hard, for a long time, holding his hard cock in her mouth, but not sucking. She couldn't suck him now. She couldn't move, only push her cunt as hard as she could into his mouth.

When the spasms ended, fading slowly, she gripped his cock tighter with her mouth and pulled her knees back up until she had her shapely ass sticking in the air again, spread with her juicy cunt an inch above his face. Then she started sucking his cock again, bobbing her mouth up and down, wanting to make him come.

Robbie tickled his mother's clit with his tongue as she sucked his cock, making her whimper because it was so sensitive. He pushed his cock up, going as far as he could into his mother's mouth. He was starting to groan, his balls tight and aching.

Neither of them heard the door open, but they did hear the startled gasp.

As his mother jerked her mouth off his cock, Robbie tilted his head back, and saw his sister standing in the door, her eyes huge, mouth gaping. Judy was looking right into her mother's uplifted, spreading ass and hairy cunt, and her brother's drenched face.

CHAPTER FOUR