Jeff pumped his enormous cock quick and hard, Jenny crying in pleasure as her entire body got furiously masturbated by her boyfriend and host. However, in her bliss, she could already feel the buildup from within and with a loud moan she could feel herself getting dragged by the stream of cum out into the bedroom. She felt as the millions upon millions of small parts that she made up started to converge as she slowly restored to her human form. She could taste her semen form as she was pulled together, rising slowly, arms sticking out from her cylindrical form which itself started shaping into her regular human self. When she could open her eyes again, she was back to her original self. She looked at Jeff, and he too, was completely normal.
"As good as that felt, and despite how awesome it feels to return to normal that way, I feel like it was way too quick." Jenny complained.
"Well, it is your turn to pick and choose your form so go nuts." Jeff replied.
"Maybe I will." Jenny replied with a smirk. "Your big cum producing nuts." She slowly approached, slowly reaching down towards Jeff's balls, keeping eye contact with him until he gave an accepting nod, and she slowly cupped his testicles. "These things could be loads of fun to be, I think. Or maybe..." She looked at the computer. "So, I haven't exactly decided yet, but I know that once we're done with whatever I choose, when we make me your dick again, I also want to be the balls."
"Well, you have the keys, so it's your choice in where to go." Jeff smirked, trying to imagine what kind of scenario Jen would come up with. "Technically, we don't have to transform only you. You could change me instead if you wanted to."
Jenny pondered for a moment and started looking through the different options on the chronivac. "Oh, I think I know what to do next."