Father And Son

This is a simple confession. I'm fucking my boss, who is also my father in law Mark.
We began having sex even before I met his son. And even though he's a far better lover than his son, I stopped having sex with Mark for a while.
But I missed his larger cock, and how he fucked me. So once Mark promoted me at work, I began enjoying his gorgeous cock again.
When I married his son, we promised each other never to say anything and again ceased having sex. Yet if you knew just how good we are together sexually you'd understand why recently I've been taking Mark's cock orally and anally.
I cannot risk pregnancy with Mark and his son doesn't like me on birth control, so Mark now gets to enjoy my mouth and rear hole only.
Which given he always fucks me to multiple orgasms up my bum, I certainly don't mind and even crave.
Some people might see all this as being a horrible thing to do. But I see it as keeping two men I love, extremely happy. hflmquu