I didn't expect my wife and my first mfm threeway to end the way it did. After trying to avoid contact with the other guy the whole time, at the end my wife was sucking me to completion while the other guy fucked her doggie. I was laying so I could see the guy's cock sliding in and out of my wife's pussy enjoying the show as I was about to cum. Just as I starting shooting my load into my wife's mouth, the guy pulled out of my wife and forced his cock into my mouth and came. He forced it in and pumped shooting his cum into my mouth while I did the same to my wife. I was in the middle of cumming so my only reaction was to pretty much to lick his dick and gulp his cum as best I could until he finished. Without even thinking of it I had swallowed the guy's load. He acted like it was nothing, totally normal. I felt awkward and really strange immediately worrying if people would find out. As he slowly pulled his cock out of my mouth, I found myself savoring it, sucking it as he pulled out then noticed my wife watching in shock. Afterward, I explained that he stuck it in without warning but she saw me me sucking it and knew I'd swallowed his cum some of which was still on my lips as he pulled out. We had a long talk after where she repeatedly said it would be ok if I wanted to experiment as long as she is there with me. I insisted that I didn't want to, that it was just something that caught me off guard but I'm not sure. She says whatever next time if I want to suck the guy for real go ahead, if not don't. I don't want her thinking I'm into guys but I'm starting to want to suck his cock for real, to see how it feels and to see if I can make him cum. I'm starting to obsess over it but I'm worried what she'll think or if it gets out to people we know.