My next door neighbors keep their camper in the driveway between our houses. Its a small but wide trailer resting only a few feet away from my recreation room windows. My wife works day hours and I work for a large bakery and work 8pm to 4am, five days a week. I get up around noon or 1pm everyday (now at 12:15) and because I am alone have breakfast in my jockey shorts and am often naked. I go into the recreation room and watch some tv while I am on my treadmill. Their trailer blocks my windows from view of my neighbors house so I never considered that their goofy daughter was looking in at me. One day I glanced outside and thought I saw a set of eyes at the bottom of the traier window. I was in my underware and just finished exercising. When I went up to my kitchen again I watched for a short time and saw Sally coming out of the trailer. She is about 23 or 24 and the complete opposite of her parents who are very sociable people. Sally is quiet and withdrawn and since I have lived here over two years only say hello to her. I don't think she has a job and seems to always be at home. She speaks to my wife fairly often but otherwise seems to have few friends and is antisocial. Over the next few weeks as I was having breakfast I sat at the window and could see her go in the trailer. I continued my routeen and go to the rec. room to use the treadmill everyday. It was like she knew my schedule and I began to see that the trailer window shade was up an inch or so everyday while I am in the rec. room for a couple hours, but the rest of the time it is all the way down. I don't know how long she has been doing it but then realized she was watching everyday. I was generally in my underware when I exercised but there were many times when I was naked. After exercising I take a shower and would go back to the rec. room to watch tv, and stay naked most of the time. It was just a suspicion she was peeking at me so I began watching her go into the trailer everyday. I then would watch how she ajusted the shade and open the bottom of the window slightly. I was shocked that such a quiet girl like her would do that. I began thinking back and it dawned on me that she had not just seen me naked but had probably also saw me masturbating. I'm not sure if the thought of it embarrassed me but it became arousing to me that she was so interested in watching me. So thats when it began, about 5 months ago I decided if she liked to see me naked I would accomadate her. Every weekday now I sit at the kitchen window and almost like clockwork, she goes into the trailer right around 12:45. I am now naked every day when i go to the rec. room and go on the treadmill that way. After I shower I go back in there naked and sit watching tv knowing she is looking at me. I get erections often just knowing she is looking at me and masturbate 2 or 3 times every week now. I started going out of my way to say hello to her and a few times tried to talk to her but all she does is wave her hand or just say hi. She is very timid when I see her outside and avoids eye contact with me yet does speak to my wife more often than ever. I've only known she has been spying on me for about 5 months but think it has been going on since we moved into our house. Maybe the reason she is so shy around me is because she feels guilty about spying on me. My wife and I are friendly with her parents and have been in their house quite a few times. Sally will say hello to us but always stays in her room when I am there. She is a very weird girl but has made me enjoy my afternoons exposing myself to her. I know she likes seeing me naked but I wonder what she thinks about seeing me masturbate so often. I'd like to know if it arouses her as much as it does to me and whether she masturbates when watching me. Now that I am naked everyday knowing she is at the window, I also wonder if she suspects that I know she is looking at me. I hope not and want her to think she is the one responsible for it.