When my wife's sister died 14 months ago her niece Kim moved in with us. She lived in New York all her life and seemed to like Florida right away especially since we live close to the beach. I hadn't seen her in 15 years until her mother's funeral and now she is 20 yrs. old. I'm retired but my wife still works for a corporate hotel chain and was able to get Kim a waitress job at one of the hotels close by. She works Fridays through Tuesdays from 4 pm to 11 pm and is off Wednesdays and Thursdays. She is very happy with the job since the tips are very good and she is home during the day. The problem, which really isn't a problem, is that she is very seldom fully dressed and seems to think that because I am an old man it doesn't effect me. My house is not fancy since it is a pre-fab and we do have three bedrooms but only one bathroom which has a sliding door since the hallway is narrow. I always knew that to tightly close the door I had to push it hard to close it properly. I didn't do this the first few months but for a long time now I peek in at Kim when she showers. Aside from constantly seeing her in many skimpy outfits and her bikini I see her naked almost every day my wife is at work. She is a very pretty girl and has a fantastic body and just by some of the outfits she wears I'm sure she knows how attractive she is. My wife and I still have sex once in awhile but now it seems I masturbate 3 to 5 times a week. I jerk off often while watching Kim shower and often get erections just looking at her in her bikini or night clothes. My wife is off on weekends but the rest of the time I am home with Kim during the day until she goes to work. Kim does shave her pubic hair and when she does she is so exposed I get so aroused watching her I have to jerk off right away . In all the times I have watched her shower I have only seen her masturbating 2 times. There have also been a couple times I saw her using tampons for her period and when she blow dries her hair she is always naked at the sink. Since I retired my life was getting boring but now it like I am 20 year younger just watching her. She started dating a guy a couple months ago and I just hope she doesn't move out for a long time.