[MF] I watched my neighbor strip

I'm in my early 30s and had recently moved into a new home in some quiet suburban town. All my neighbors were nice enough and came by to introduce themselves to myself and my wife when we first moved in. All the neighbors were a bit older with grown children, but our one neighbors to the right of us had two teenagers, a boy and a girl. Erin was the daughter and she was an 18 year old high school senior. Her mother introduced us briefly one day but unsurprisingly she didn't care to chat and quickly went inside. That was pretty much the extent of our interactions, she'd wave or smile but then just hustle to her car or into the house and that was that.

Erin was an attractive girl, but I assumed wasn't deemed as one of the "hot girls" of her school. She had a slightly above average face but you wouldn't exactly do a double take if she passed you on the street or anything. She was into athletics so she rarely wore makeup and always dressed casually. She had really long light brown hair that was always pulled back in a ponytail. She was also very tall, probably close to 5'10", and was rail thin from what I could tell through the baggy clothes she always wore.

Late one night I was working in my office upstairs while my wife was asleep in our bed in the room over. Suddenly I was distracted by a light that came on in a room directly across from my office at the neighbors. I couldn't believe it when Erin stepped into frame and began looking herself over in the mirror. I always had a voyeur fetish but never imagined I would actually find myself in a situation like this. Erin lifted her sweatshirt over her head and stood now in just sweatpants and a sports bra. She was turning side to side and running her hands on her body examining herself. I couldn't begin to think what she was critiquing about herself because her body was incredible. She was lean, tan, and fit with the faintest outline of abs that I could see as she ran her hands over her stomach. I was rock hard almost immediately. I instinctively took my cock out and started stroking myself without a second thought. The light was off in my office so I wasn't worried about her being able to see me.

After a minute Erin lifted her bra over her head and revealed a pair of really small but impossibly perky tits. She rubbed them, pinched her nipples, and shook herself up and down a bit to get them to jiggle. She looked at them almost disapprovingly and all I could think was what a shame it was for her to not realize how unbelievably hot she was. Another minute went by and Erin dropped her sweats and was standing there in tight panties that showed off a perky little bubble but. She did the same as with her tits. She gave her ass a little smack, squeezed and shook it as she looked at it over her shoulder. Erin then stepped away where I couldn't see her anymore and the light turned off in her room. I immediately closed my laptop and went to my bedroom where my wife, Allie, was sleeping. I climbed into bed and started caressing Allie's tits and grinding up against her. We had a great sex life and it wasn't unusual for either of us to wake the other up if we were horny and needed to fuck, but there was no way in hell I was going to tell her I was this turned on by peeping on the 18 year old next door. I proceeded to fuck Allie with more aggression than I had in a very long time and I think even she noticed something different about it, but didn't comment on it.

After that night I wasn't able to get Erin out of my head for months. She was all I could think about and all my porn tastes shifted to younger woman with similar builds and looks. After several months and resigning myself to the fact that seeing Erin naked was a one time lucky occurrence, it happened again. Same exact situation as the time before, I was working late and then the light came on next door. Erin proceeded to strip and look at herself. This time however, I did something so profoundly insane that I still don't know what I was thinking, but I'm very glad I did. Without thinking, I stood up and turned on my office light, making me fully visible if Erin should look over. And sure enough, a few seconds later Erin looked then did a double take a covered her tits with one hand and her mouth with another, then scrambled to put her shirt back on. I just smiled and waved at her and to my shock, she sheepishly looked down at the floor briefly and then smiled and waved back.

We just looked at each other for a few seconds when again, no idea what I was thinking, I removed my shirt. Erin stared wide eyed, but never looked away. I took her steady gaze as a greenlight and I dropped my pants and boxers so that I was standing in the window completely naked with a throbbing cock in my hand. Erin's mouth hung slightly open, but she never looked away. I stroked my dick slowly and watched as Erin slipped a hand up under her sweatshirt. She never took it off, but it was obvious she was playing with one of her tits. This was so erotic that I came violently within a minute. Erin smiled and chuckled slightly and then I stepped away to turn off my office light and clean up before heading to bed. My head was spinning with what had just taken place, and I knew the risks were off the charts, but I just wasn't able to help myself.

Part 2 is available if anyone is interested.