When I was 13 my older brothers girlfriend who was 16 moved in with my family because she had some unfortunate family events and had become homeless. I had a crush on her from day one, she was girl next door cute, but looked a lot like Elizabeth Shue from The Karate Kid and she was one of my favorite actresses. Most of the time I couldn't keep my mind, or eyes off of my soon to be sister-in-law. She had pretty blue eyes, big tits, a firm, round ass and cute, tiny feet. I didn't know what to do with the thoughts and feelings I was having about her, so like most early teen boys, I acted out in agression, We had all the usual rivalries, pretty much like brother and sister. When I was 15 it all started to change. We lived in an older house with the skeleton key style door locks on the inside doors. On several occasions I would peek through the keyhole while she bathed or showered, when she was asleep and nobody else was in the house I would sneak into their bedroom and lift the blankets so I could see her in her nightie, a lot of times she was nude. I'm sure she knew for a long time that I was infatuated with her as her behavior had also changed. She would come into my room in just panties and a tee shirt, bend over in front of me so I could see down her shirt, sit across from me in the livingroom so I could see up her skirt and do numerous other things that girls do to tease guys. They moved out of our house and got their own place when I was 17. I started finding every excuse I could to go to my brothers, often spending the night on Friday or Saturday. My brother worked a lot of hours and rarely had a saturday off, this was my chance, I could finally be alone with her. I would sleep in the livingroom on the couch when I stayed over and at 6:30 my brother would take off to go to work, she would be up and doing her thing shortly after. The third time I stayed over I woke when my brother started his car and I set my plan into motion. I heard the toilet flush and knew she'd be down the stairs soon, my cock was rock hard in anticipation. I arranged my cock so the head was sticking out of the leg of my shorts and pulled the blanket to the side and pretended to be asleep when she came into the room. As she walked past me she stopped dead in her tracks, I cracked an eye open and saw her, standing there staring at my cock. She went into the kitchen and started making a lot of noise emptying the dishwasher and putting the dishes in the cabinet. I sprung up off the couch, "what's all the racket?" She just smiled and sarcastically said "life goes on whether you're up or not around here". She was so sexy standing there, arms stretched above her head reaching into the cabinet. She was wearing a tank top and no bra. I went into the kitchen and asked her if there was any coffee made, she said that was next on her list. She looked me up and down, giggled and said "looks like some parts of you are more awake than others" She was wearing a pair of tight fitting satin boxers and she was barefoot with red nail polish on her toes. I looked at her tits, nipples pressed against the thin white cotton and told her that I could say the same of her. I looked up and down the length of her body a few times and then told her "you know, I always thought you had the prettiest feet, what size are they?" She told me they were a 5 and said she wished my brother would notice her feet because she thought they were one of her best features. The tension was so thick you could have cut it with a butter knife and you could smell the hormones in the air. She quickly tried to change the subject and said "weren't you supposed to mow the grass for us?" This was my chance and I wasn't going to blow it, I was 17, I knew nothing about being suave and smooth. I answered her, "yes, I'm gonna cut the grass, but there's something I need you to know" She laughed and asked "what is more important than mowing the grass" It was now or never! I pulled my shorts down underneath my balls with my fully erect cock out right in front of her eyes and said "This is more important than the grass, I've been watching you shower, staring at your tits and ass for four years and jacking off every day because of you, I have to fuck you before you marry my brother." Her face turned as red a a fire engine and she said "well, since you put it that way"....... then she dropped to her knees and started sucking my cock right there in the kitchen. I couldn't believe it was happening, I thought I was going to pass out. She sucked my cock fast and hard, taking me all the way down her throat, squeezing my ass and digging her fingernails into me. She cupped my balls in the palm of her hand and slid her fingertip back to tease my asshole while gagging me all the way into her mouth. We moved to the livingroom to finish by fucking in every imaginable position and after 3 exhausting hours I headed out to the yard and took care of the grass. They were married a month later and we never touched each other again, until four years later when they divorced. We've been occasional fuck buddies ever since.