Fucking my boyfriends younger brother

My ex fella Rob was one of six brothers, the youngest being twins, Paul & Dan. I met them for the first time at there dad's wedding, they had turned 18 the previous month, not at all identical Paul was about 6ft and well built were as Dan was at 5ft 6 and looked like a runt. I got on with them immediatley, especially Paul, who was extremely friendly, being from rural north wales, they asked if they could visit and stay over, which they did. Although I did'nt realise at the time, Paul would make sure he came down on his own, especially when Rob was working on weekends when I was off. We became close and then he confessed to me that he thought he was gay and fancied me! My inital reaction was to laugh it off and said its probably a phase and the fact I was seeing his older brother made it impossible for anything to happen. This did'nt deter him and he would send me text messages saying it was'nt a phase and he often wanked off thinking about him sucking my cock! I'd be lying if I said I was turned on by this and after a few more messages I then received a picture of his cock that he had just taken in the bath, and fuck me it was massive & put this brothers to shame! Next time he visited he showed me his rock hard cock in his shorts, and I'd laugh it off, anyway not taking no for an answer I was sitting on the sofa when he whipped out his cock and shoved my face into it, before I knew it I was choking on it, he then pulled my shorts down and was returning the favour, I took him into the bedroom and with him layin on his belly I opened his arse cheeks and ate his tight pink hole, within seconds he got on all fours and wanked his impressive length and squirted a load of thick jizz all over his chest then I emptied my load on his arse. Racked with guilt afterwards I vowed never to be alone with him again, which I knew was wishful thinking, I took his cherry and fucked him at every chance I got, and when I split with my ex over something else, it was his younger brother I missed the most