Caught by Girlfriends Roommate

There was a time, while studying at the university when i lived at the dorm of my girlfriend for about a year, to save some money! It had 3 seperate "bedrooms", one kitchen/living room and only one bathroom! Besides my girlfriend two other girls lived there at the time! Haven´t seen one of them more then 2 or 3 times, but the other one was pretty much at home 80% of the time! She was 20 years old, pretty small well rounded but still sporty! All in all pretty nice to look at! As it is in such dorm appartments the walls are pretty thin, so we often heard her vibrator at night and she also heard me and my girlfriend quite a few times! Sometimes weor she asked about how the last night was, if it was fun and so on, fooling around a bit....We all have seen each other in our underwear (unfortunately never lingerie :D ) or only wearing a towel and so onfooling around a bit! After about 2 month when i was in the shower, actually i was wanking while showering it knocked on the door! I stopped the shower and asked what she wanted! She asked: "Are you finished soon? I have to leave in like 5 minutes and i have to get herself ready and i wasn´t expecting you to take that long! (due to wanking it took me longer :D ) Or can i just come in?" Since i couldn't get rid of my hardon that fast and since we had one of those halftransparent shower walls, where you couldn't really identify anything through it, I said sure, come in, but don´t look (laughing). She walked in, just answering with a stressed "haha" walking straight up to the sink starting to brush her teeth and so on! I turned back on the shower and continued! Since I didn't dare to go on wanking I took my showergel and started rubbing in al of my body so that if she would see something through the glass it would only be normal showering stuff, with a hardon but well! Of course I watched her silhouette through the glass and to my surprise she had pulled down her pants and sat on the toilet peeing! Somehow that was too much for my already throbbing cock and i felt the orgasm coming! i turned to the wall as if i wanted to wash my belly, shooting ropes and ropes of cum into the shower while that girl was sitting halfnaked on the toilet only a few feet away! That was a unwanted but very very nice orgasm and i don´t think she realised what had happened! After that she got up, flushed down and left, only saing thanks, by and that she hadn´t looked! Actually I used that situation and many fantasies about possible other endings when wanking! From that moment on it wasn´t that much of a problem to walk into the bathroom as long as the shower was running and the door was unlocked. One day about a month later I was sitting in "my room" with the door open (one of my courses was called off, normally I wasn´t at home the whole tuesday, just like my girlfriend) when I heard her open her door and saw her walking past my room comlete naked, only carrying a towel and some sort of box in her hand walking towards the bathroom! In my shock i couldn't even say hi, so she didn't realise i was there!  I got quite a good view of one boob and her ass, pretty nicely shaped. After a few minutes of showering i started hearing the noice of an electric razor or something similar. ;) Since she started moaning a few minutes later i guess it was something else :) After about 20min i heard the bathroom door and again saw her walking past my door naked! This time i just had to greet her! when she had just passed my door i said: "Hi! Did you have a nice mornig shower?" I just heard the sound of something falling to the ground and a lou "Ahhhh"! After a few moments a very, very red headed, shocked and embarrassed looking girl looked around the edge of my door, holding her towel up in front of her asking: "Since when are you at home?" I told her that i hadn't left today, smiling! Her head turned even more red "So.....so u have seen me walking around naked and didn´t say a thing? Did you see something? Did you hear something? Oh my god!" I just smiled and said that i had only seen her side for a second and that there was nothing to me ashamed of and that it wasn't the first time that i had heard her! *smiling* She just said, OH god and went back to her room! Luckily everything turned normal pretty much the same day, so no big deal! Again, after about another 2 month or so, i was home alone, at least until 5pm when the roommate comes home! So i had 3 hours for everything i wanted to do! I was cooking lunch naked, washing the dishes naked, sit in the living room naked, walk around naked (as i always do when i am alone) and so on! In the afternoon i decided to watch some porn in my room! I closed my door, sat down and started watching some videos and since nobody was home i turned up the volume! After about 20 minutes i had to get myself something to drink! I opened the door, walked into the kitchen, got myself a drink and walked back, still with a full hardon! Both ways passing her room! Her door was open but luckily i couldn´t see anybody inside! (what a mistake ;) ) I turned back on one of my favourite videos and kept on wanking! I leaned back and started cuming on my belly and chest! Seconds after the last rope i turned off the video and wanted to start to clean off my cum when i saw her standing in my door saying: "Hi, had some fun this afternoon?" *smiling* i quickly covered up my cock with my boxers being shocked as hell! I just said: "What? How? When did u come home? How long have you been standing there? what the hell? You said you woul come home at 5pm?" Se just smiled and said "Now we are even and it is already 5:30!" *laughing* and walked to her room! After having cleaned off my cum i went to her room and asked again when she had come home and how much she had seen! It turned out that she came home after i had started watching porn with my door still closed and since she heard the noices she didn´t want to disturb and that she had seen me walking to get a drink from my feet up to my belly on the mirror in her room while lying in her bed! (She had quite a nasty smile on her face telling me that!) And finally she said that since i hadn´t closed my door when i returned to my room, she could clearly hear the video very loud and also my noises quite clear and so she decided to walk over and give me the same schock as i did with her and that she wasn´t expecting to see me cum just when she looked around te corner and that she couldn't say a thing and just had to watch me finish! When she told me that i was embarrassed, but also turned on as hell! We kept talking about masturbation, not telling my girlfriend, about things guys like and girls like, about the porn we watch (actually surprised by her watching bondage and s&m and she couldn´t believe that i love outdoor, public and risky stuff) Well the last few month in that dorm went pretty normal except for no more closed doors anymore when my girlfriend was not at home and occasionally some glimps but nothing too speacial! Unfortunately I haven´t really heard anything from her since she moved to another state!