My treadmill is in an upstairs room with a window facing the neighbors. Now there isn't a lot of space between the houses, and that window is almost directly opposite our neighbor's 16 year old son's bedroom. I have noticed before someone at the neighbor's window when I was jogging on the treadmill and started to suspect that the son was watching me exercise. There are venitian blinds on his window, and what he does is raise just one closed blind so that he can look out of it. I know when he is there because its the only time that the blinds are closed but one is kind of propped open. When I first figured it out I started closing the curtains when I was on the treadmill, but then I started just leaving them open and pretending that I didn't notice. Sure enough I started noticing the blind. This past Saturday morning I did something a little more daring. I usually jog on the treadmill in some running shorts and a tank top, but the whole idea of being watched by him was kind of turning me on. So I went in there with the curtains up wearing just a bra and some skimpy panties. I glanced toward the neighbor's window and noticed that the blinds were full open which usually means that he isn't there watching me. Anyway I started my exercise on the treadmill and in less than a minute the blinds were closed except for that one that he peeks through. I suddenly got a very embarrassed feeling and felt my face turning red, but I kept on with my jog trying to pretend that I wasn't being stared at while just in my bra and panties. The embarrassed feeling left me in a bit and I got really turned on by it. As I was jogging I was wondering if he was over there jacking off while watching me. The whole thing was such a turn on. I did cut my exercise routine short but after I was finished I did do a little stretching to give him something more to see. How should I feel about all this?? Is it wrong to let this boy see me like that?? I'm sure he is jacking off while he is watching me don't you think??