Carolyn Hax: He cheated on his wife, and it's a weighty issue
Adapted from a recent online discussion:
Cheated on my wife for the first time last week.
But after reading other people's questions, I feel like a low priority.
No, you're not off the hook that easily.
Why'd you do it?
To undisclosed location:
"First time" makes it sound like you already know there is going to be a 2nd, 3rd, 4th, 5th, etc.