Modified Exercise Ball

"Hey Suzy," Ben greeted the Invisible Woman as she stepped out of the elevator. "Courier came by with a package for ya. Put it in yer bedroom."

"Thanks, Ben," Sue said with a smile. Which served to hide the brief moment of confusion. She hadn't been expecting a package.

Once she was in her bedroom, however, all became clear. It was from Karla. The psychiatrist's name was on the packing slip. She must have had it sent over as soon as their session had ended. The heroine formed an invisible knife and ran it through the tape over the seams of the box.

It was an inflatable exercise ball, a deep pink. Exactly what she had recommended Sue Storm use for her stress-relieving exercises. Only, unlike every other such exercise ball that Sue had seen, this one had been modified with a kind of saddle for Sue to straddle.

Sue had no idea what the saddle was for—the instruction booklet was in Japanese—but it was obviously high-tech. She followed the visual instructions to plug the ball into a wall outlet. Immediately, there was a hiss, and lights on the saddle began to glow. As it charged, it inflated the exercise ball. Quite a high-tech piece of exercise equipment.

The afternoon passed. A satellite that would have fallen on Manhattan required the Fantastic Four's intervention, and Sue and the others managed to deflect it into the Hudson River. Valeria lost one of her last baby teeth. The whole family went out for ice cream. It was dark when they returned, and time for bed—Sue managed to get the children washed, dressed, brush their teeth, and in bed by nine. Reed disappeared in his lab, muttering something about positronic signatures.

She was about to shower and head to bed herself when she saw the pink sphere of the ball. Now fully inflated, the lights showing green for fully charged. Sue recalled her promise to at least try the exercises that Karla had outlined.

So it was, still clad in her clingy Fantastic Four uniform, Sue moved the exercise ball to the middle of the bedroom and settled herself into the saddle. It was surprisingly comfortable, the pink material had an odd texture, somewhere between velvet and leaher, a bit plush but firm enough to seem to mold itself to her buttocks and crotch. With her arms out in front of her, feet firmly planted on the ground, Sue began to raise and lower herself.

The exercise balls were a good bit of kit, one that Sue had appreciated during her pregnancies when she needed the extra support getting up and down. When she'd been big, center of gravity low and off-balance, it had been difficult enough to exercise at all. For most of her life, however, Sue had scarcely used such devices. Still, if it helped her de-stress...

Then, as her weight settled on the ball and caused it to budge, the saddle began to vibrate.

It was such a shock that Sue almost leapt off of the exercise ball—and with a sudden flush, she realized why Karla had thought these exercises might help ease Sue's sexual tension. She stood, buttocks lifted off the saddle, and stared down at the inflated device. Little more than a glorified sex toy—well no, more than that. It had functioned properly, as an exercise ball should. It just had an...added feature.

Sue Storm licked her lips. There was no one around to see. And it was supposed to help her...

Not without trepidation, as emotions roiled within her, Sue gently settled herself back down. When her weight fully pressed into the saddle, the vibration began again. This time, since Sue was expecting it, she was not shocked. Slowly, she began to rise and fall. The vibration varied, not constant, and seemed to reflect the pace of her exercise. Sue felt her breath quicken faster than just the movement would allow as the buzz of the vibrator pressed against her labia through her uniform and panties. She couldn't imagine what it would feel like if she wasn't dressed.

After about thirty reps, with her thighs burning, Sue stood up fully. The saddle ceased to vibrate. She plugged it back in to re-charge and wandered, a little loop-legged, into the shower. The warmth in her body had only a little to do with the exercise, and quite a bit to do with the unexpected stimulation.

Sue resolved to try it again, tomorrow night—she had promised Karla to try it for a week, at least. There was no harm in that, surely?