My then girlfriend nor I wanted that I would be present and see how her boyfriend would be fucking her. But her then boyfriend wanted that because of his dominating obsession. He was more jealous against me because of my financial and succesfull career then I was against him fucking my girlfriend. So he absolutely wanted to humiliate me as a sort of powerplay. My girlfriend had quite some feelings of guilt toward me but did it anyway because she liked her boyfriend and their sex so much. She wanted to please me as much as possible to compensate that situation that we did not like both. So she put me in my favourite submissive atire: caged, dildo inserted and diapered with only a t-shirt on. When her boyfriend came in the bedroom he could not hide that he was satisfied seeing me in such a submissive attire and role. I had even the impression he got a hard-on more by seeing me and the powerplay then wanting to fuck my girlfriend. I was sitting in the couch in our room while he was engaging to have sex with her and did not dare to look. My girlfriend was quite stressed of that whole situation and could not relax with me being there. The guy was very horny with his dick being hard as apiece of concrete and she having her vagina tight because of her stress so he could not penetrate her because she was so tight and she had pain. After quite a half hour of trying to loose her up with no result he went to our living-room to have a drink and she called me to come on the bed with her. She started to cuddle with me to make me feel better and I suppose even more to comfort her and she started to rub me between my legs making my penis twitch in my cage and moving the plug in my ass through my diaper.
I then started to lick her pussy wanting to have also some pleasure while she was stimluating my sensitve spots between my legs with one of her feet. We both forgot that her lover was there having a drink in a our living room. I was able to loose her up and to finger her when then her lover came back. Her lover came back and sat on the bed pushing me gently on the side to continue for what he came that day. I noticed he was not hard anymore what I thought was funny. Roles got a little inversed apparently and I was surprised to have a ind of pity for my wife and her boyfriend. He started to rub his dick to get hard again. I thought I could help and went on my knees next to the bed taking over his cock and stroking it very gently and also starting to suck on it. Both my wife and him saw this as a total acceptation of me of that situation and we started all to smile. My wife opened her legs and I helped him introduce his penis in her for the first time without a condom and then went back sitting in the couch watching how he pushed his cock deeper in her. After some strokes they were both i a kind of extasy forgething I was there. The fact that my girlfriend was completely in extasy and forgetting that I was there touched me more then the fact he was fucking her. It was as though I was not existing anymore. This frustrated me but made me also very horny and started to fuck myself with the dildo that I had in me. I thought it was quite pathetic but I orgasmed in the end in my cage with a limp dick. He then also came in her filing her with his semen what was not our agreement in beforehand but I had it induced myself. After they cuddled a little he went back to our livingroom to have a drink and I joined my wife on the bed to cuddle her. I then went down on her to taste the cum of her boyfriend. She first tried me not to do that but I insisted and felt that it was a kind of agreement we gave to each other to explore our cuckold-dynamic even further. Afterward she told her boyfriend that I sucked up his semen instead that it stayed in her. What astonished him... 
Moments to never forget! From then on all awkward feelings vanished between my girlfiriend and myself concerning an open realtioship and she encouraged me also to have gay encounters having noticed how I liked to please her lover!
