Caught... From my husband's brother!

My husband's brother was visiting us. My husband was out getting pizza when I was overcome with lust. So I quickly remedied the situation myself and had a nice wank in my pussy. I didn't realise straight away that my husband's brother was standing in the doorway wanking his cock and watching me. Suddenly he stood in the middle of the room and wanted to fuck me. I know that it is forbidden if I fuck him now but I was so wet and extremely horny that I let him fuck me without restraint. And with the hot cock he has, I couldn't say no. At the end he sprayed all his cum on my arse which was not exactly a little. It really ran down my arse all the way to my dripping pussy. I just hope that my husband never experiences this fuck with him!