That's A Great Start!

The words were barely out of Dr. Stone's mouth when Sue Storm's smile grew brittle. Her heart sank, as though a hole had opened up in the middle of her being. The heroine was strong, but for just a moment, she thought she might cry.

"Yes, a fantastic first step," Dr. Stone said. "Now you can go further."

Sue's brow crinkled.

"Further? I came with my asshole! Isn't that enough?" the Invisible Woman said.

In answer, Dr. Stone stood up. She was wearing tight leggings today, which hugged her own pert derriere. It was a butt that spoke more of squat day at the gym than milkshakes; there was almost no jiggle or softness, just the half-spheres of well-developed glutes. She pulled a small box out of a desk drawer, then returned to hand it to Sue.

The heroine opned it.

There, nestled in a milky bed of pearlescent silk, was a butt plug. Smooth, white, with a blue 4 embossed on the slightly rounded, flared base. Next to it, a small tube of clear lubricant.

"I want you to start wearing this every day," Dr. Stone said. "Just for an hour or so at first. I want you to get used to it."

"I—" Sue paused, not sure how she should respond. "I can't!"

"Of course you can," Dr. Stone said. The psychiatrist tilted her head, and the glasses caught the light. Sue closed her eyes as the bright circles burned in her vision. SHe wasn't sure what it was about the window and the glasses, the time of day and the angle of the sun, that managed that particular trick so regularly.

"You want to," the psychiatrist said, as the gravimetric pulse knocked out the parts of Sue's brain that controlled her inhibitions. "Just think of how good it will feel. You naughty little secret. That constant weight and pressure inside your ass, stimulating you constantly. In fact, you want to put it in right now."

"I—I shouldn't," Sue managed. The words were mechanical. She opened her eyes a little, letting them rest on the plug. The round bit, the part that would go inside of her, was the size of a large chicken egg. The point was rounded, smooth. She touched it. Not plastic. Some kind of ceramic. Yet it was heavy, as if the core was steel. There would be no way to forget it was there.

"Of course you should," Dr. Stone said, as the implants Dr. Stone put inside her skull to augment her powers buzzed maddeningly. Patience was the name of the game, but the villain knew she couldn't keep Sue in this state for long. "Go ahead. I'm a medical professional. I want to make sure it fits."

Which is how Sue Storm found herself bent over the chair backwards, pants and panties down around her knees. She looked back over her shoulder, turning most of her torso transparent so that she could see as she nagivated the lube-covered plug to her tight sphincter. It was still a little sensitive after yesterday's session, but fortunately Sue had cleaned herself out before her appointment.

The heroine gasped as the cold, hard, heavy plug pushed against her pert pucker. Dr. Stone watched, utterly absorbed, as Sue relaxed her ass muscles and pushed with steadily increasing pressure, until the ring of muscle gave way and the whole thing slid inside, until the flared base pressed against her buttocks. Immediately, Sue had to fight the instinctive urge to push it out, to go to the bathroom. But as she pulled pants and panties back up, that need died down to a persistent urge in the back of her brain.

"Perfect," Dr. Stone said. "Wear it a little each day. See how it grows on you."