Mistaken sexuality?

I talk about my OTPs quite a lot, so I'm not surprised that my mother thinks I'm gay.(￣∇￣") She comes up to be talking about how her new show has a lesbian pair now, and said "You like that their gay, right?". I mean, nothing wrong with being gay, but I just don't feel comfortable knowing my mother really doesn't understand my sexuality!╮(￣▽￣)╭

Anyways, how did you deal with it? This isn't limited to just straights mistakes for gays, but it's for everyone! How did you explain, please tell me.... ( T﹏T )