Alright so here's what happened. I was with my girlfriend and her best friend who's a buff looking dude, hispanic, same height 5'8 I think, long hair and he's part Caribbean. They hang out with each other frequently, text and call. He's even with us when it's just suppose to be us two alone.
Usually when we hang out, he'll carry her in his arms like a princess or a damsel in distress and she'll have her arms around his neck. They do this often, and usually they'll be talking to each other throughout the entire time forgetting that I'm there.
Then this time I came over to her house, she got outside with him. I don't remember what exactly happened but we were talking about her panties and he knew exactly what she was wearing. Which I found very odd, so I brushed it off and changed topic. Then this guy wanted to compare dick size in front of my girlfriend, who's his best friend. So I showed mine by hand, which was 7.5 and girth. He then proceeds to show his as 9 inches, and a larger girth. This was done right in front of her, so she already knew he had the bigger dick.
Later on he tells me as we're walking home in the same direction. That he already fucked her, he told me that they were at her house, watching a movie and he was playfully teasing her and she told him "Fuck me *****". This was on the day, he supposably guesses her panty's color. She was on the sofa elevated, and he got on his knees, lifted up her blouse and started eating her pussy. He said that she moaned his name, and was gripping the sofa. He then took out his 9 inch dick and began to impale her. She screamed of joy, and he enjoyed it but stopped because "it was wrong". Then I came and that's were it then continued.
It didn't bother me, cuz there was no proof. Me and her then broke up, and I use to imagine how'd he fuck her, cum all over her face.