MMy dads friend is a ?

Ok. Im not being offencsive or anything but im young and i find it hard to deal with. One of my dads best friends katia is a . it makes me uncomfortable around her, and I just dont feel as happy around her as i did before, when i didnt know. why is this? Im not a myself and i dont want to be and i think she kinda scares me now. its just that she always comes over (considering her and my dad are really close) and I just now go in my room and play music loudly now to avoid her. It upsets me that i feel this way because before i knew that she was I really liked her and we would do so much things together. She was like my auntie. Alos she comes round in the mornings when im in my PJ's and it makes me feel awkward so i quickly go get dressed. But before i knew I wouldnt care if I was in my PJ's or I was wrapped in a towel from getting out of the shower. Now I cant stand her coming round. Help me please with this strange feeling??!