Sue Decides To Fuck Until She Stops De-Aging

"Uh...uh...uh...UH..."

Sue Storm rocked back and forth, eyes closed, blonde hair mussed and plastered with sweat. Small, soft, blemish-free breasts bounced on her chest as she ground her hips. Wrinkles, scars, stretch marks—all the signs of a life of adventure and two kids had vanished, revealing the fresh-faced young woman as she had been when she first stumbled from the rocket ship, parts of her turning invisible unconsciously as she got used to her powers.

Beneath her, Reed Richards wheezed. Her hands kneaded his chest like a cat making muffins, and his elastic body deformed against the pressure. There were more grey hairs on his head, and the wrinkles in his face were deeper. An invisible cock ring clamped about the base of his prick, preventing blood from flowing back out of his dick as Sue ground her hips.

There was a knock at the door.

"Uh, Sue?" Johnny said. "Kids are asking if you're coming to dinner..."

"Mommy and daddy are busy for a little while," Sue called out, her voice high-pitched and full of energy. She felt as if she could go all night.

"Help," Reed croaked, stretching one arm toward the door.

The arm hit an invisible wall.

Sue tsked, and reached for a scanner, pointing it at herself.

"Only 18 and a half. Still got some tachyons to work off, Mister Fantastic. You can go another couple of rounds, right?"

Warm tears leaked from Reed's eyes. He could feel her cunny getting tighter and tighter, her muscles younger and more vigorous. He had not counted on the fact that the de-aging was also erasing many of Sue's fatigue poisons as fast as she accumulated them. His endurance, superhuman as it was, was no match for an 18-year-old slut.

"Sue, please..." he said.

The Invisible Girl leaned down and whispered in his ear.

"Come on, daddy. I'll let you fuck my ass...I know you've never fucked the ass of a hot 18-year-old before."