Actually, there is a mod that adds the Lost Girl as a NPC. You'll probably find it by typing in "Lost Girl" into the mod browser. You could find a Lost Girl who isn't a Nymph and have her move into a home. You could then talk to her and have her wear a copy of what you're wearing. It's quite different from the suggestions mentioned in the last few posts.
Ummmm I just checked the mod browser, and I cant find such mod. I found MyNPC mod on the forums, but there was no download there, and it cant be found on the modbrowser either.