I'm in my room trying on bikinis for my friends Bach party. My bro walks in and finds me... I ask for his help on deciding on which ones to bring since he has great taste. After I've tried on a few bikinis, I notice he has a hard on!! It's a little weird but I'm flattered so I continue to try on more bikinis. He makes a comment about how I should take off my bottoms. I am hesitant but quickly become turned on and strip for my bro. It escalates into fucking my bro and him cumming inside me!