Heather was a chatterbox on the drive home. Her hands tightly gripped the steering wheel, and visibly shook whenever she reached for the turn signal. She was running on pure adrenaline. Her whole world was about to change. The lab found no other candidates but her for the growth project. They needed her, and Ben gave his blessing for her to go through with it. Her childhood fantasies were on the cusp of becoming a reality. Plus they were offering her a $300,000 bonus for participating in the trial.

Ben’s mind lingered on that last fact for some time. If he was truly such a rare specimen, why was Heather getting three times the award? Enlargement must be in higher demand, he thought. Still felt like a kick in the dick, given what he’d signed up for.

They both signed on with their own size modification experiments. But Heather only consented to taking part in enlargement after Ben completed his reduction trial. She wanted to be there with him every step of the way, to care for him, protect him, and... Whatever else that came to mind.

Riding in the passenger seat, Ben opened one of the large white boxes given to him by AJ. Inside were bottles of various tablets he had to take daily for the next two weeks to prep his body for the procedure. 

“Poly-gly-ce... What the fuck does this even say” Ben said, irritated, then picking up another bottle. “This one starts with a ‘U’ and the rest may as well just be word vomit.”

“Are you even listening?” Heather interjected.

Ben set the bottle back in the box. “Huh?”

“Did you see the way she looked at you earlier? When she was talking about keeping you as her subject?”

“Yeah. AJ looks at everyone like that.”

“Bullshit.” Heather went quiet for several seconds, feeling territorial over her man. “You’re my subject. She’d best remember that.” Heather flashed a playful smile at Ben.

“Of course, honey bunny.” Ben replied dismissively. He set the box of supplements behind Heather’s seat and popped open another one. “Huh. This box just contains another box. It’s basically the Inception of boxes.” Ben turned to Heather looking for a reaction. He didn’t get one. 

He went back to inspecting the inner box. It was plastic, but sturdy. He flipped it around a few times before finding a side that was different. On that side he found a clear plastic window. No - it was a door. A door that had a lock. A lock that could only be operated from the outside. It was-

“A CAGE!” he shouted. He turned to Heather looking for her reaction. He didn’t get one. This time he repeated himself. “A cage, Heather! She wants you to keep me in a cage!”

“Yeah. She mentioned that to me earlier today. It’s for your safety.” Heather blithely replied.

“It LOCKS from the OUTSIDE!” Ben was not at all okay with any of this. The insinuation was clear. The tiny subject will do as it’s told. Making matters worse, Heather began to chuckle. “This funny to you?” he exclaimed.

“Don’t worry my little pet. I’ve been thinking of all the places I’ll keep you safe, and that cage isn’t one of them.” 

“Fuckin’ A right it isn’t,” Ben muttered, eyeing the cage with indignation. 

They drove another quarter mile before Ben’s brain decided to process Heather’s last sentence.

“Wh- uh,” He found himself at a rare loss for words, “What did you- Where would you.. Keep.. me?”

Heather beamed smugly for several seconds before answering. “Remember my old jogging shoes?”

“I thought you threw those out.”

“I was going to. Never got around to it. They’ve got to reek of foot sweat by now.”

Ben spent most of his life terrified to admit he had a foot fetish. Early when he and Heather first started dating, a date night ended with him getting hammered and licking her feet. He didn’t remember for how long, but she did. About seven minutes before he fell asleep in a drunken stupor. The next morning she recounted the entire episode, watching the blood drain from his face in embarrassment. He had nothing to fear. Heather was actually super into it. Since then, she’d given him carte blanche on foot stuff.

“Yes please!” he exclaimed, practically blasting out of his seat with arousal.

“That’s not all, lover,” Heather said, “I spent all afternoon thinking of the things I’m going to do with my little man..”

That night, after Ben took his shrinking supplements, they fucked to the limits of physical exhaustion. Heather, in rare form, was on top, dominating, controlling every motion. She was ravenous. Insatiable. Triumphant. She would soon realize her greatest, most impossible ambitions. She never felt more alive.

On the edge of drifting asleep, Ben whispered to his lover, “What if I was stuck small, or you were forever a giant... Could you still love me?”

Heather smiled. “I’d still love you even if all that’s left is a tiny speck of a man on my fingernail.”