My ex wife's bed with one of her FWB. I was there checking the mail while my ex and kids were on vacation. He showed up randomly looking for her and found me instead. We made small talk, he told me how much it turned him on when she made me blow him and how he used to beg her to make me take his cock. She always said no. I told him she wasn't around so if he wanted me, then do something about it...he definitely wanted me!