I (f19) let my best friend and roommate (f19) fuck my boyfriend (m20) whenever she wants

My college roommate, Tessa, and I have been best friends ever since we were paired together as roommates our freshman year. Things became interesting between the two of us one day when we were discussing our sexualities. We both talked about how we were bi-curious but had never had any experience with another woman, and she threw out the idea that we could try kissing each other. We both had boyfriends at the time so we each called our bfs and asked if it was ok. Needless to say, they were very enthusiastic about us experimenting with each other. So that afternoon we kissed each other twice, for about 5 seconds each. It was fun but simple, but it led to much more.

From that day on, whenever the 4 of us were all together, the boyfriends would ask us to kiss each other in front of them. Things kept progressing gradually from there as the 4 of us became more and more comfortable with opening up about sex with each other. For example, one day while all 4 of us were together and going to the pool, my boyfriend pulled my bikini top to the side and exposed my boobs to the other bf. I was terrified and tried to cover myself, fearing that we had crossed a line, but my roommate just laughed and assured me it was ok and she thought it was hot. You can probably guess what happened next but I’ll tell you anyway, my roommate’s bf went up behind her and did the exact same thing, exposing her boobs to my bf for the first time. I guess the guys took it as a competition to see who could get their gf to do the craziest thing, because my bf then pulled my tits out once again, except this time he invited the other bf to grab a handful. That took him by surprise and he hesitated, looking at Tessa to make sure it was ok. Again, Tessa reassured us that she was loving this, so he took the opportunity and greedily pawed at my boobs.

Again, things escalated quickly, and by the end of that night all 4 of us had fooled around (mostly just touching and kissing) with the other person’s partner, as well as watching each other give blowjobs to our own bfs. That night launched us into a short period of time where we explored all sorts of sexual freedoms together, starting with giving blowjobs to each other’s bfs and continuing until we were having full-blown foursomes and couple swaps. Things between the 4 of us stopped whenever Tessa and her boyfriend started having relationship problems, and Tessa eventually broke up with her bf for a reason completely unrelated to the foursome (he was a jackass lol).

When she told me about the breakup, I told her “well if you ever need some good dick, you know where to find it!” She laughed and said the only good dick she had had in the last few months was from my bf (her bf’s cock was on the smaller side and thin, my man’s is 6-6.5” and thick). So she took me up on my offer and she fucks my bf on a regular basis! Usually all 3 of us will fuck together but occasionally I’ll let the 2 of them go at it alone if I’m ever not in the mood. We’re all very happy with our current situation and have no plans to change anything or stop anytime soon!