My next door neighbor

My next door neighbor is a physical therapist and his daughter has been my best friend since we were very young. What I am most ashamed about is the fact that I have been letting him abuse me since March of 2008. My girlfriend told him about my persistent back pain and he offered to give me therapy for it. It started innocently at first but each time he massaged me it became more intimate and I became more exposed to him. After the first few times instead of me wearing a robe he had me putting on a terrycloth wrap around insisting I completely undress. I have known him from early childhood so I did what I was told. He has a professional massage table in the spare room and always locked the door. Each time I was more exposed to him but for some reason never complained about it. It was the fourth or fifth time that he not only massaged my back but began massaging my legs and buttocks. He always told me first when he was going to do that but each time would open the wrap wider exposing me all the more. It felt so good I ignored my embarrassment of it. He was so bold about it he had his daughter tell me when to come over and had her tell me to call anytime I wanted him to do it for me. It became a weekly thing and I go over sometimes twice a week. Some days I would be at the house with my girlfriend and he would asked how my back felt and offer to massage me. As a few months went by he had me so at ease and manipulated me in such a way that I was naked much of the time he was giving me the so called therapy although I was always face down. I was no longer embarrassed by it and when he began having my lay sideways I knew he was doing it to see my breasts and vagina. I liked the way he massaged me so much I didn't care that he saw me like that. Then one day he asked me if I wanted him to massage the front of my body telling me it was called a full body massage. Without any thought I just told him I would like that. I was 18 by this time and knew perfectly well what he was doing but also knew what I was allowing him to do. His daughter asked me a few times about how he was doing it but I never mentioned anything more than soothing my back pain, which by this time I very seldom had. He always used a lotion and the first time he had me face up started by only rubbing my shoulders and had me hold my arms up over my head. For the longest time he seemed to avoid touching my breasts but did massage up and down my sides before he finally did. The next thing I knew he was rubbing my legs and I became aroused almost from the time he rubbed my breasts. Both hands were used on each leg and several times his thumbs touched my vagina. I wanted him to do more but that day he didn't and just left the room telling me to shower. He did almost the same thing the next two weeks but the fourth time he gave me the full body massage he ended up masturbating me. I orgasmed 3 times that day and from then on it became part of his therapy. It is obvious I am having an orgasm but he never says anything about it and neither do I. His daughter is not the least bit suspicious about it and she still often askes me if my back hurts. She sometimes asks if I want her dad to give me therapy and I don't know how I stop from laughing when she uses that word. Her father is very friendly with my parents and never lets on in any way of what is going on. I look foward to it each week and have yet to ever object or want him to stop doing this. He still always does my back first and always asks me if I want him to do the rest of me every time. We both know what we are doing is wrong but I never refuse him. He never exposes himself and never masturbates but many times I notice he has an erection. At first I tried to hide the fact that I was having an orgasm but no longer try. I do keep quiet when I climax and at times he holds his finger over his lips to quiet me down. He never says anything but just gives out a shussing noise so his daughter don't hear me. I am ashamed of myself but continue letting him massage me. I can't even explain how good it feels and look forward to it each week. I never tell anyone about it and his daughter is clueless as to what her father has been doing to me all this time.