As she pushed the wet crotch of Robbie's shorts into her mouth, sucking in pleasure, she moved her hand into her panties and began to slowly agitate her inflamed clit. Moaning with her son's shorts stuffed into her mouth, she arched her hips up, her legs spread wide, thrusting a middle finger into her cunt and making juicy sounds. She was thrashing about and whimpering so much that she did not hear the bedroom door open.

She did, though, hear the startled gasp.

Her son stood there in the doorway, his eyes wide, mouth gaping. He was staring up between his mother's spread thighs, watching her panties stretch as her finger plunged in and out of her cunt.

For a long, breathless moment, both were frozen in position. Robbie was in the doorway, his teenaged eyes wide and, although surprised to see what his mother was doing, fascinated. Karen, with her knees drawn up, her feet wide, her crotch arched high, his shorts in her mouth, was almost senseless with hunger.

A shudder went through her body. With a cry, she began to stab her finger frantically into her cunt as her son stood staring. She lifted her ass high, twisting it, moaning past his shorts, her eyes burning on the front of his pants. Her fist inside her panties stretched the nylon crotch, exposing the soft hairs along the puffy slit. The wet sounds came, faster as Karen began to approach orgasm, her hips twirling.

"Ahhhhhh!" she squealed as her cunt grabbed her buried finger in orgasm.

She pressed her finger deep, her knuckles smashing the soft lips of her pussy. She trembled hard as she came, her eyes closing.

When she opened her eyes again, her son was gone.

Removing his shorts from her mouth, she sat up, still weak from one of the strongest orgasms she had experienced in a long time. She adjusted her panties over her cunt and smoothed her dress down, wondering why she had continued finger-fucking herself with her son watching. A lewd giggle burst from her as she felt history repeating itself, only now it was she and her son, not she and her father.