I've been called a pervert....by lots of people. I don't really care, it just means I like sex and porn and things of that nature.
Most of the people I know, including family members, know that I like hentai and am a perverted person so it's nothing new or surprising to me if I'm called a pervert.
If she ever calls you a pervert again grab a kitten by the head, squeeze it until you crush it's skull, and suck the brain out of the eye sockets. That'll show her who the real pervert is.