Turn her into a slob.

Your first thought is to use this to, if not the fullest extent, something pretty crazy. Transform Carrie into something that’s basically the opposite of her. She’s fit, she’s cleanly, and she’s a very energetic, active person. Wouldn’t the opposite of that be...a slob? Your transformation kink goes in a lot of directions, and you’ve certainly jerked your meat to more than a few stories of a thin, attractive girl becoming lazy, overweight, and crude. It wasn’t necessarily the end result that mattered, as the sheer level of the change, and how much the character grew to love what they’d become.

But you flinch at the thought. This is real life, with your real life girlfriend. Would you really be able to go through with that, on her? Carrie clears her throat, getting your attention. “I see you mentally backpedaling over there, and I’m not having any of it. Whatever you just thought of, whatever you wanted to do, do it to me. Right now.”

She sounds serious, she really wants you to do it. With your heart beating like crazy, and your cock starting to get painfully hard, you pull out Carrie’s statistics and start changing them. For weight, you go with adding just a hundred pounds. Overweight, just past chubby, but not into super obeseness. You lower her energy level, increase her laziness, increase her appetite, turn up her body odor, make her grow more and thicker body hair, make her gassier, change her personality to where she’ll enjoy these changes, and make her cruder and more crass. It’s the whole package, ready to go with one press of the button. Your only question is, do you want to make this happen instantaneously, or spread it out as a slow change?