I just want to say Merry Christmas!  Also, I slept with an engaged woman
Why did you sleep with her?
Because my wife said I'm all good to do so
Well at least you wished me a merry Christmas. It's nice to get greeting like that on the holidays.  Would you like to discuss why you slept with another woman, in the meantime?
I'm happy with Merry Christmas!
In that case, I appreciate you taking the time to send warm wishes my way. And as long as you and your wife have an open and understanding relationship, as does this other woman, a Happy New Year to you and yours, to boot!