The Changing Mirror

I'm looking for someone who will play my gf who is also a powerful sorceress. One evening, during a 'stay-home date', she transforms me from a fit, good-looking guy in my twenties to a fat slob in his fifties/sixties. After having some fun with that, she transforms herself into a dumpy, frumpy matron in her fifties/sixties. Obviously, I'm willing to tweak as much as possible, but I have to say I'm not into TG.