Although Joann had suppressed her orgasms, seldom coming when her husband fucked her, she knew what an orgasm felt like. She thought she was about to come now.

She clung to the door knob, her legs feeling weak. She was almost afraid of what she would see if she opened the door, afraid she would lose control. If her son and daughter were up to something erotic, Joann wasn't sure what her reaction would be. There was no way she could walk up to them, confront them. She had to be a sneak, slip up on them. Maybe that way they wouldn't know she had spied on them.

Sucking in a deep breath, she opened the door slowly, making sure it didn't creak. She peered into the garage. She saw her son's head through the rear window of the pickup, and next to it was Judy's.

Stepping softly into the garage, Joann waked as quietly as she could along the side of the pickup. She paused for a while before looking into the door window. She stood on the passenger side, her body starting to tremble.

She peeked into the window just as Dave cupped his sister's cunt.

Joann pressed the knuckles of her right hand into her mouth, effectively stopping the sudden gasp that had grew inside her throat.

She saw her daughter jacking on Dave's cock, the huge head swollen, wet at the tip. She saw her son's hand cupped between Judy's thighs. She stared with unexpected fascination at her daughter's small hand sliding up and down Dave's cock. There was a tingling feeling in the pit of her stomach, and her panties suddenly became drenched as her cunt throbbed.

Joann felt an excitement she had never experienced before. She felt it was wrong to spy on them this way, wrong to feel such steaming pleasure from watching her daughter jacking her son's cock, holding his balls. Yet there was no denying the sudden ecstasy that was searing the lips of her hairy cunt, making her pussy drip with hot fuck juices. She could feel the juices of her cunt running slowly along the insides of her thighs, and she wanted to smash a fist into her cunt, rub her pussy brutally, bring that swelling orgasm to the surface, and come as she stood watching them.