A Betraying Slut.

My best friend has this boyfriend she's been with for slightly over a year. They're pretty great and amazing. I won't lie I've eyed him a couple of times and he is a snack. About three months ago I came out from the club and walked into a convenience store at around 10pm because I wanted to get to a nearby hotel and it was raining. It happened that he also walked into the same store. We told each other hey and when he asked what I was doing out so late, I told him my plight. He then offered to let me stay in his apartment and I obliged. I didn't tell my best friend about it, because she would freak out. Fast forward to when we finally got to his apartment and I got to freshen up there. He had a two bedroom apartment so I got the guest room. I thanked him for his help and got so tired I fell asleep.
I eventually woke up at around 2am because I was hungry. I wanted to get to his kitchen and check for something to eat, but I didn't have any clothes to change into, as I slept naked. The only available clothes were is girlfriend's sweater jacket and some of her underwear and they were too small. My boobs are massive and so is my ass, compared to my bestie. We're total opposites. I managed to wear the sweater anyways but I couldn't wear her panties. They were too small. I put on my Gstring for comfort and stalked to the kitchen and started to look for something to eat. I don't know how long I was there, but it was long enough for my bestie's boyfriend to catch me red-handed without me knowing and keep staring. Then he crept behind me and smacked my ass. I jumped up and noticed he was in nothing but briefs, and his bulge was massive. I wanted to run to the guest room immediately but he held me and said "I know you like what you see. I like what I see too". And then he talked about how he's always wanted to feel me, and that my boobs were way bigger than his girlfriend's and that he wished he could fuck me. And before I knew it, I was laying on his couch, with him above me, rubbing his huge cock on my dark nipples. And from there we had the most mind-blowing sex. What didn't we do? I sat on his face, I gave him really sloppy head (This was really sexy because around this time his girlfriend had called him and they were sweet talking over the phone). And I finally got that huge cock inside my pussy. I came a lot and he even licked it. We had about five rounds of sex that night, and he said not even his girlfriend could do this.
Three months later and we're still fucking behind my best friend's back. He even gave me a vibrator that's controlled from his phone. And he got me a lot of sex toys which I use to take videos to send to him. I feel sorry for my best friend, and I don't want to ruin their relationship, but the sex is too good. Another day when I came over he told me to dress in my bestie's bikini and it was so tiny for me. It barely covered my nipples. And he fucked me in that bikini. My nipples are so sensitive, and he loves sucking them a lot. He also loves fingering me a lot. One time he was with his girlfriend and she was on her period so he said he was going to get her pads. What she didn't know was that was in his car, with said pads, waiting for him from nearby, and we had a quicky.
They're getting married in a month and I'm the maid of honour. We had the wedding rehearsal yesterday. All I can do is wish them a happy marriage, but I won't stop getting his massive cock into my constantly wet pussy. He got a house not so far from me and that's where him and his future wife will be staying. In that same house I've cum on the kitchen counter, on their bed, and on their staircase. I've sat on his face and he ate me out while listening to a voice recording of a song his girl sang for him. Even when he got his wedding suit he fucked me in it. My mark is everywhere and I don't plan on stopping soon. I like how we're this nasty. Sometimes I'm tempted to take a video of him eating my pussy and send it to my best friend out of spite. But I won't, for now. All I can wish them, is a haooy married life.