Lynn was drawn closer to them. She slipped into the room and stood at their feet watching her daughter's creamy ass bounce up and down. She could see her son's cock being devoured by the pink hairy lips of Carolyn's cunt, his balls looking full. She grasped one of her hot tits, digging into it harshly. Her eyes glazed with wanton hunger, her cunt pulsating almost painfully.

Carolyn's hot cunt seemed to be working up a froth at the base of Bobby's cock. Bobby only had to arch his cock up and let his sister fuck him. The sounds of their heavy breathing told Lynn of the excitement they felt.

"Ahhh, so fucking hard!" Carolyn mewled, smashing her cunt down onto her brother's cock. "Your cock is so fucking hard, Bobby! I can feel it throbbing! Oooo, I hope you have a real big, hot load of come juice in your balls!"

Lynn watched her son pulling at the tight cheeks of her daughter's ass. Carolyn's puckered asshole flashed at her and Lynn licked at her lips, squeezing hard on her tit. Her other hand slid down over her trembling stomach, going toward her fiery cunt.

"I'm coming already!" Carolyn suddenly cried.

"Me, too!" Bobby groaned, arching his cock deeper into his sister's grinding, clutching cunt.

"Oooo! I can feel you coming in my cunt!"

"I can feel your cunt, too, Carolyn!"

Lynn saw her sons balls tighten with the spasms of his cock. She saw her daughter's naked ass twist, the hair-lined lips of her cunt clenching. Quickly and silently, she slipped from the room, pulling the door closed again.

With her legs shaking, Lynn went downstairs. She tried to be angry, but couldn't. It had been beautiful, she thought. Never in her life had she dreamed that Carolyn and Bobby would do such a thing. But there they were, fucking right under her nose.

Deep in thought, her cunt still throbbing, Lynn left the house through the back door. She walked outside into the warm night wearing only her thin gown. She had had to exert a great deal of will power while in Bobby's room. She had wanted to reach out, to touch her son's balls, to stroke her daughter's creamy, naked ass. It had frightened her at first and if they had not stopped fucking when they had, Lynn knew she might have done it.