There's usually a reason for a fetish. I for one don't necessarily think you are attracted to your aunt so much as the femininity she represents to you. I could be completely wrong on this, you are the only one who will know.

Pantyhose can be very sexy and alluring, that's why there are so many different kinds, a lot of them made to specifically be sexy. Legs are sexy, I don't think it's abnormal to hyperfocus on them. Slippers might have something to do with a foot fetish, which I have. I might be completely wrong, but maybe this will give you at least something to think about.

Irony - I have many fetishes, none of which my fiance is into. Oh the torture! My advice: when you pursue a relationship try to find someone who is at least accepting of some of your sexual interests!