Fucked by boss at work

I am a 35 year old male, married for 6 years to a beautiful 33 year old, and I love having sex with her, but about 6 months ago, I am still not really sure exactly how it all happened, but I found myself bent over the desk of my boss, a 48 year old black man, with his large cock balls deep in my ass, pumping in and out of me, and I loved it. I went home that night and with my boss' cum in my ass fucked my beautiful wife. Since that day my boss fucking me has become a regular thing, and I get excited every time I am called into his office, and disappointed when I leave his office with out getting my ass fucked. About a month ago I was called into his office and my hopes were dashed when I saw two other men in the office, but when he said, "Get over the desk, I told my friends how nice your ass is to fuck and they want to try you out." I couldn't get my pants down fast enough, I heard one man say, "eager little faggot isn't he." That night I had the cum of three men in my ass when I fucked my wife. I don't know if I am actually cheating on my wife, since I have never fucked anyone else, just been fucked by others.