I (18M) have turned my neighbour (~18F) into an exhibitionist [FM]

Ever since I moved out from my parents place I've been really enjoying experiencing my exhibitionistic side and it turns out the neighbour girl enjoys it too.

My bedroom and kitchen are directly facing another building of the same design. The girl in the apartment across from mine is another student, she's average height, straight blonde hair, skinny with a cute little butt and I'd guess b or c-cup. She's got very sexy long legs and a toned but feminine build. Most importantly though she's got the face of a super model.

At first I don't think she noticed me. I would however walk into my room and get dressed after a shower with the curtains open and get undressed before closing my blinds at night. It always turned me on a lot doing it when she was in her room so I'd always be kinda half hard doing it. After a while I noticed she was looking out her window more often which made me hopeful so one evening I just decided to get undressed while she was looking before I got to the window to close the blinds. She never looked when I looked out my window but I could see her catching a lot of glimpses out of the corner of my eye. When the blinds were down I checked in the cracks of it and saw her go back to her usual business.

This continued for a few days and she'd always get up to stand close to her window or start talking on her phone while looking out the window when I entered my room. One day she seemed to wanna start sending clearer signals and when I entered my room I saw her cleaning in just her underwear. She was wearing a matching set of white lace underwear. Her butt looked so cute and round and her hips were surprisingly wide for such a skinny girl and she kept looking back when she bent over to see if I was looking. She came over to her window and I could better see her from the front, i noticed her underwear was a bit see through and you could kind of make out her nipples on her firm breasts. I decided it was a good time to return her favour and just stand in the window and look.

A week goes by and it's just the regular stuff with her watching me naked. One day my girlfriend came over and I noticed the neighbour was in her room. So I opened the door to the bedroom from the hallway and made my girlfriend get on her knees and suck me off. I'm not sure if she could see below my waist but I kept making eye contact with her as I was being pleasured and she was not taking her eyes off the scene. After a while I noticed her putting a vibrator on her window sill and that almost sent me over the edge.

I grabbed my gf and led her to the bedroom bending her over the bed to fuck her. I was just starting to enter her when she unfortunately told me to close the curtains. While doing so I made sure my neighbour at least got a good look at my hard cock for the first time. The sex was great and I even decided to tell my gf the neighbour had been watching her suck me off which made her super excited.

Some days later I saw her again in the window as I was entering my building. By the time I got up she had gotten completely undressed and was facing me on the couch feeling up her breasts and using her vibrator. I got naked and even though other people could have seen I decided to just touch myself standing by the window to make sure she could see my hard 8 inch cock while laying down touching herself. She looked me in the eyes and just inserted the vibrator into her pussy and I could see her shiver as she did. It wasn't long before I saw her orgasm like that and she just laid there for me to see until I also came.

Since then she's been going around naked a lot in her apartment and it's almost become a nightly routine that she watches me masturbate in bed before I close my blinds. One time I even made my gf ride me reverse cowgirl so they could look at each other. My girlfriend said she was touching her breasts through her top and when she removed her top my girlfriend couldn't help herself from orgasming on my cock saying she wanted the neighbour here. This was incredibly exciting to hear and my gf has brought up several times since then that she wants to watch me with the neighbour.

This brings me to the other day when I was in the laundry room. Again, I'm an exhibitionist so I like wearing my pyjama pants in there so girls can see the shape of my cock. The neighbour house and my building share laundry room and I think she saw me going down there. So she came to do laundry at the same time as me in a similar attire with a low cut blouse and her nipples clearly poking through the thin fabric. I instantly started getting hard and she had to squeeze by me to get the machine next to me. In order to get the rest of my clothes cleaned though I had to use one more machine and had to squeeze by her too. I made sure to do it when she bent down and stopped for a second with my hard cock pressing against her butt to say sorry. She looked back at me without moving and told me not to worry. Somehow all I could think to say was "thank you" and she just giggled and said "you're welcome". I squeezed past her again and she pushed herself back on my cock and I told her "not now, my girlfriend wants to watch". She turned red and just let out a "wow", turned on her machine and made sure to brush her hand against my cock on her way out.

I've been thinking about this since then and I'm very excited to see what happens next.