Suspicions finally came true
Very shortly after I met my wife she started introducing me to her friends and family. One guy seemed to come over more often than the rest. I asked my (then gf) what the deal was with this guy. She kept saying he was just a friend. Anytime I was over he acted like a friend would. If I came home and he was here, everything was innocent.
2 weeks ago I thought I had to work a double. Turned out I had looked at the wrong day. So I went to the store and got some food to make for dinner. I didn't tell her I was off for the evening because I wanted to surprise her.
I parked where I always park. I walked into the living room and there on the couch was my wife and her friend. He was sitting on the couch. My wife was in his lap. Both of them were naked. She had her back pressed against his chest. His c*** was b**** deep in her ass and she had a vibrator buzzing her c***.