I work from home and last weekend I broke my laptop so I had to use my girlfriends instead. My girlfriend’s a photographer and she took a bunch of photos the other night of a party we were at. When I was bored at work I decided to look through those photos but when I opened the tab the videos section popped up. I’m the top left corner I saw a thumbnail of a video where she was naked. I run to get some tissue and sat down ready to jerk off. I clicked on the video and it was my girlfriend standing butt naked in our bedroom. She 5”4 blonde and curvy. The video started off with her standing, she then turned around and bent over showing her thick ass, tight butthole and wet pussy. She then got on all fours and started fingering herself. I then hear a man’s voice, “You are so fucking hot baby, get on your knees” I pause the video and realize it had been taken less than a month ago, my girlfriend and I have been together for 2 years. I stop jerking off and hesitantly press play. My girlfriend turns around still on all fours and crawls towards the camera, the camera starts to move and I realize it’s being held by the guy. As I watch my girlfriend undo this man’s belt and pull down his pants, I still am unsure of who he is. She pulls out his dick and he looks pretty big already even though he’s not completely hard. “Holy fuck daddy you are huge.” She says. “Open your mouth slut” he says, I then realize it’s our friend Greg. Greg is our age (25) 6”2 and in athletic shape. My girlfriend then opens her mouth and he takes his cock and starts slapping her tongue, then her face. She then grabs it and licks the sides before putting the whole thing in her mouth. He’s now fully hard and about 9 inches big. About 5 inches bigger than me. I click to see how long the video is and it’s 37 mins. I almost never last longer than 10 mins before cumming. My girlfriend spend 5 mins sucking his dick on her knees before Greg sits on the bed and she keeps blowing him for another 3. At one point in those 3 minutes she says “ugh you’re so much bigger than my fucking boyfriend.” My heart sank but her saying that made me so hard I felt like was going to cum in my pants. I started stroking my dick under my pants. I keep watching, she grabs the phone that they are recording with and puts it on the desk, she then climbs on top him while he’s seated and starts riding his big dick. She keeps commenting on his size, “you’re so fucking big daddy” “I’m gonna cum all over your fat cock” She’s moaning like I had never heard before. He then puts her on all fours and starts fucking her from behind. “Dont stop I’m gonna cum, I’m cumming” she shouts. You can also hear her queefing very loudly but they don’t even adress it. The only time I’ve heard her queef, she made so many jokes about it that we almost couldn’t finish but with him she just kept going. She then starts twitching and screaming but he keeps going. “Fuckkkkk that was fucking good, ____(my name) has literally never made me cum” She’s laying there, mascara running, sweaty as fuck and still queefing when she moves. She then turns to him and starts sucking his dick more, “cum in my mouth daddy, pleaseeee cum for me” after a bit he starts stroking quickly and shoots a fat load mostly into her mouth, plenty got on her face and tits. They then turn off the cam. I then look through her messages and see that she’s told her friends in a groupchat about every detail and said that she was scared at first because of how big he was. Then they made a few jokes about my dick and we’re hinting at her to break up with me. Later my girlfriend came home and I didnt know what to say, after a bit I was horny so I started kissing her and she quickly pushed my head towards her pussy. She had been working outside all day, with Greg at the golf course. I couldn’t tell if that smell was from being outside or from her getting railed my Greg but I felt disgusting and I loved it. I the moved her onto her front and spread her legs, now licking all up her ass crack and then her ass hole. 2 minutes into smelling and licking her ass, I accidentally jizzed all over the floor. She got up and said she was gonna take a bath but I could hear her using her vibrator. I then go to check her messages and see she went to text Greg right away. She told him about me cumming quick, thanked him for fucking her at work and asked him if she could sleep at his place tonight. She told me she was sleeping at her friend Jill’s place and left our house 15 mins ago. I can’t stop thinking about the nasty things he’s going to do to her.