I have a hot first cousin named Kate. She spends a lot of time at my house. We have two bathrooms, one upstairs and one downstairs which is by my bedroom. Kate uses both but when she uses the one downstairs she takes longer. I figured that she was taking a crap. But then a few months ago, I didn't know that she was in there and i walked in on her sitting on the toilet with one leg on the sink and the other on the tub fingering herself like crazy. Then she saw me she yelled at me for not knocking and to get out. She left later that day. When she came over the next weekend, I was in my room. Only my mom was home and she never uses my bathroom so when I heard someone coming down the stairs I figured that it was Kate. Without thinking I went into the bathroom and hid in the closet. Kate came in, locked the door, assumed the same position as last time and fingered herself for close to ten minutes until she had and orgasm. She then got up, went to the sink, grabbed a rag and cleaned up. When she was done she pulled up her pants and left. When I heard her go upstairs I got out and went to my room. I thought about what I saw and got really horny, and beat off. Ever since then I can't stop going into the closet when I hear her coming down the stairs. I hide in the closet and Jack off while I watch her fingering herself. I don't know what to do because I like watching her. I have a normal relationship with her hanging out and having fun but I just have to watch her. We are both 17 and even though I had sex with my ex-gf I can't help myself. I have done this for the past few months and I don't know what to do. Is this Normal, and what should I do?