Gwen the voyeur!

Outside the door Gwen can't help but smile. She'd been listening to their breathless conversation and she had to say: She didn't know her brother, now sister, had had it in her! It was now going on two minutes since they had fallen asleep and she could hear her father's snores echoing from under the door.

Gwen couldn't hold it in any longer. She wanted to see!

Opening the door quietly, she snuck in. It was to no surprise to see her father behind her brother/sister, holding her tight, covered at least from the waist down with a cover. He was holding her tightly, one hand possessive on a boob and the other under the covers presumably on her crotch. But Gwen wasn't about to be satisfied with just that.

A peak wasn't much, so she was going in for the whole show.

Being as quiet as she could, she shimmied the cover from under her father's arm and pulled it down to her sister's knees.

With a nearly inaudible gasp, Gwen looked down at the ravished body below her.

True to form, her father's hands were on her boob and crotch respectively. John's leg was thrown over their father's thigh, displaying her for all to see, if she hadn't been covered in a blanket. What was interesting to see was that her father was two fingers deep in her sister. His cock semi-hard as faint tremors from John's inner cavern kept him in a half-hard state. In sleep, he was a perv too, it seemed, and with every twitch from John his fingers wiggled. Both would breath a little heavy at that.

Gwen stared, transfixed. Shivering from the cold, John's vagina must have contracted heavily on their father's man-meat, because he gave a little thrust. Then another. Soon that hand that was fingers deep was pulling back and holding her steady as he set up a small pace.

_Holy shit! _Gwen thought, mouth dropping open. He'd not blown his load less than a few minutes ago and he was going again? And while he was sleeping?

John moaned at the sensation, her legs widen as she pushed back against her father's dick. The shallowest of thrusts were starting up from the two sleeping people. Gwen couldn't help it. She shoved her hand down her pants and touched herself as John and her dad fucked right in front of her.

It was hot.

Gwen came in a minute, tops, as she watched the humping continue for a few minutes more. Then they both stopped, obviously exhausted.

With a daring little move forward, Gwen dipped her fingers into her sisters wet snatch and rubbed them both. It was warm and moist inside the little abused, love cave. Gwen set up a little pace of one-two-three thrusts with two fingers for a few seconds before pulling out. Which set them to thrusting all over again, little moans of contentment slipping out of both of them (more grunts from her father and little sighs from John) and Gwen managed to eek out another orgasm before she fled the room.