Fingering Her Asshole

The zipper pulled down...and down...and down. Sue Storm drank in the sight of more and more of the Black Widow's flesh being exposed, thanks to the image inducer. The red hair seemed to fall across one eye, just as Natasha's did. The lips curled in a familiar smile. Only the slight aura around the head showed that it was an illusion.

The zipper didn't stop at the Black Widow's crotch. Sue caught her breath as the natural triangle of red hair was exposed. Then the flash of dark lips, so different from Dr. Stone's own pussy. The figure in the chair opposite her shifted her hand, the arm going under her leg so that she could continue to pull the zipper down; on the body suit, it ran all the way up to the crack of her ass, and the Invisible Woman saw the pert, dark buttlehole buried between the small, well-muscled cheeks.

A part of her wondered how much of the exposed, naked flesh was Tony Stark's extrapolation of what Natasha looked like naked, and how much was based on actual scans. She had wondered sometimes if they had ever had a fling. Sue wiped her sweaty palms on her knees.

The Black Widow changed position. Ass pointed toward Sue, knees balanced on the edge of the chair seat. She smiled at Sue over her shoulder as she dribbled a bit of lube from a conveniently placed bottle onto her fingers.

"The anus," Dr. Stone's voice came through despite Natasha's image. "When properly prepared and treated, is an intense erogenous zone."

Sue Storm's eyes were drawn to the dark little divot between those cheeks, outlined by the edges of the zipper. One lubed-up gloved finger rubbed at the little divot. The doctor's words ran over the Invisible Woman—cleanliness, the need to go slow at first, using plenty of lube—yet she watched as one finger ceased to tease the sensitive little sphincter and instead pressed against it. Pressed, and pushed inside. The soft sigh that escaped the Black Widow's lips was natural, unmistakably so. The heroine wondered how many times Dr. Stone had touched herself this way.

Yet her eyes remained fixed on Nat's ass as the finger slowly pushed in and out. She watched the finger stretch the tight little hole. Expose a little of the pink insides. Sue's attention was rapt, but she found herself on the edge of her seat, ass shifting back and forth as she rubbed her pussed against the cushion through her own clothes. As the display went on, Sue could see the moisture gather on the Black Widow's exposed pussy. A drop of liquid glistened near her clit as a second finger pushed in with a wet schlick. The doctor's voice lost some of its confidence as she established a steady rhythm. Fucking her ass with her fingers with genuine excitement.

"It...it's not easy to climax with just your ass," Dr. Stone's voice came from Natasha's mouth, tense and struggling to concentrate. "But it can be a great...additional stimulus. W-when you masturbate at home, you might want to try it...w-while thinking of...other women..."

Sue Storm nodded. Though she wasn't sure she would be able to keep her thoughts from Dr. Stone.