Be 26 but look 20ish

Oh I missed the post where OP said he only had a couple months until she hit the local age of consent.
Well, nevermind. Lying to a girl for a couple of months is pretty culturally normal according to the American television of I've seen.

Nonce

Thanks, the comments in this thread were pretty much exactly what i expected, but it was nice all the same.

Create an elaborate story about how you were orphaned at a young age and they didn't have your real birth certificate so your age was a guess but whoops it's just been rediscovered and you're actually 8 years older than you thought, somehow.
Don't worry about her thinking too hard about the implications of that story. You can use any potential dissonance to gaslight her into doing depraved sexual things.

>I'm an artfag with a dayjob
you gotta be more specific than that. artfags go to school too