Dave looked up at his mother and caught her gazing at the front of his pants. He suddenly grinned at her and lifted his crotch slightly, twisting his ass.

Joann gasped, her hand going to her throat, but her eyes didn't leave his crotch. Dave ran his hand down there and cupped his balls, watching his mother's reaction. Joann's reaction was to swallow hard, her eyes turning fiery as she gazed at his hand there. Dave then ran his eyes up and down his mother's body. He couldn't see much through the shapeless dress, but he could imagine her naked. He grinned at his mother, a wicked grin.

Joann's cunt swelled and began to throb. She leaned against the door jamb, her eyes smoky with heavy desire, unable to hide it from her son.

Again Dave turned his gaze to his sister's ass. He ran his tongue over his lips suggestively, knowing his mother was watching. He squeezed his balls, then withdrew his hand. Now there was a growing outline of his cock along the left side of his crotch. When he looked at his mother again, Joann was looking there, her own tongue moving about her lips as she stared at his swelling hard-on.

Dave shoved his feet off the couch, standing up. His cock thrust out against his pants, fully hard. Joann stared at his prick's bulge, feeling herself shaking, her cunt turning wet and fiercely hot again. Her tits swelled, and now she was sure her nipples could be seen pressing at her bra and dress. The cartoons were over, and Judy finally turned her attention to her brother. She saw his cock straining out, and giggled. She had not seen her mother yet. She turned onto her side, her small hand reaching for her brother's cock.

"Ooo, it's hard again, Davy!" she squealed in delight.

With his eyes directly on his mother, Dave arched his hips to his sister's hand. Joann couldn't breathe as she watched her daughter caress Dave's cock through his pants. There was a heat in her green eyes that caused them to focus only upon Judy's hand as the fingers rubbed the length of that hard-on.