It all started once when I've heard two of my friends talking about my brother. They both fucked him in separate occasions and they were talking they really liked the size of his cock and that they should try a threesome next time. This made me reeeeeealy curious, and when I get something in my head I go until the end. I spent almost a month trying to figure it out how to approach my brother but at end I decided to just marching in to the bathroom while he was having a shower and say "Sorry I didn't know you were in here". And I got really lucky!! He was jacking off and I got the courage to tell him "I can help you with that, if you want". Well, now two months have passed since then and I'm enjoying his big cock almost every day, when our parents are out.