Kat and I had been married for 12 years and had always had a great sex life. We had recently joined a swinging website and had already had a few hot sessions with other couples, though we were keen to have either another man or woman alone with us, as opposed to a couple. One of my fantasies was for Kat to dominate me and make me watch her with another guy and then get me to clean his cum from her pussy; unfortunately we just could not find anyone suitable on the website. nnTwo weeks ago an old friend of mine, Mike, contacted me and said he would be working in the area; innocently enough I invited him to ours for the weekend, which he accepted. It was only when I told Kat later that day that she mentioned the possibility of Mike helping to make our fantasy come true. I was fairly certain Mike wasn't bisexual but Kat and Mike had always flirted with each other in the past and I thought he would at least be up for it with her. Mike arrived on the Friday while I was still at work and he and Kat sat in the garden drinking all afternoon. Kat later told me that she had been extra flirty with him and that he seemed up for it with her. When Mike had gone into the kitchen to get a refill, Kat had followed him and came onto him; initially Mike was reluctant because of me but Kat went on to tell him that I knew what she was up to and had agreed. Mike was still wary and to reassure him, Kat sent me a text message asking if she still had permission to fuck Mike; I replied yes straightaway and when Mike saw my reply he could barely restrain himself and minutes later Kat and him were on the sofa, kissing and groping at each other. nnAfter getting the text, I was immediately horny at the thought of Kat being fucked by my friend and headed home; when I walked through the door I heard the sound of heavy breathing then Kat's voice saying "Fuck me harder, don't hold back". I walked into the front room and Kat was on all fours on the sofa, naked, whilst Mike was fucking her from behind with his unprotected cock. I was solid and went to move towards Kat but she said no, and told me that I could just watch. Kat then turned her attention to Mike, urging him on to fill her pussy with his cum; a few minutes later he done just that as I watched, rubbing myself as my wife's pussy was filled with Mike's hot cum. Both Kat and Mike collapsed back onto the sofa, his semi erect cock and her pussy covered in their combined juices. Kat spread her legs wide and beckoned me over, saying that I had a job to do. As I knelt before her soaking wet pussy, Kat explained that while Mike was not bisexual, he had agreed to let me suck his cock and balls clean after fucking Kat and at that, he moved across the sofa and held his cock in front of my face. Kat said, "Go on whore, suck it down", and I did as I was told, taking his cock deep into my throat. Mike groaned as I licked his cock from base to tip and it started to get hard again, his hands were on the back of my head as he fucked my mouth and suddenly his cock twitched and spurted a thick load of cum into my eager mouth, which I swallowed. nnKat was rubbing her pussy as she watched; I could see what looked like gallons of Mike's cum oozing from her as she used it to lubricate her fingers.