"Anything, huh?" Hebe smiled slyly.
"O-of course," Derrick protested weakly.
"I have an idea then," Hebe grinned. "Didn't you wanted to be with me and thought I was pretty?" Derrick nodded. "Then I think you're gonna love this..." As she said this her hands touched his chest again, and seemed to meld with him. His eyes widened as she started to melt into his skin. Where her body touched his it was sucked into him, until Hebe had vanished, leaving him lying there on the massage table.
He lay there confusedly, wondering what the hell had happened to her. Then he felt his body grow, re-aging several years and then proceeding past how old he had been. But his development wasn't consistent all over: his body hair did not regrow and his cock remained tiny.
Suddenly, Hebe's voice laughed in his head. "Do you get it yet?" she asked. "I figured instead of taking your age, I would take your body." He suddenly noticed his skin tone has deepened to Hebe's Asian complexion, and his muscle mass and fat distribution were more feminine than masculine. He... he was turning into her.
Just to confirm it, weird contractions wracked his body. He moaned in a higher-pitched voice as his chest expanded, soft mounds emerging around his larger nipples. "Do you like having breasts?" Hebe asked in his head. "I always like to ask guys that-" she stopped talking as she noticed him cupping the boobs, and felt a shiver of pleasure ripple through to her.
Finally, the changes reached his crotch. His balls, still inside him, redeveloped rapidly into her ovaries, and what length his penis had receded inside him until only a sensitive nub remained. Both he and Hebe panted as his former sac reshaped into her new lips and a slit opened down the middle, establishing her ownership of what was once his body.
With that, Hebe reasserted control, climbing out of the massage table naked.