What country song has the words, "We really shouldn't be doing this..."?

Or, "We really should not do this..." It's sung by a man and it sounds old-fashioned. Those might not be the exact words, even but the meaning was the same. I don't listen to country music so I don't have any idea who sings it but could be a mid-aged dude. It's hard to tell what decade it came from either, but to me it sounded like it was from the 60's, but who knows. Any clues?

My ex-boss used to play that song, while his wife was stationed overseas! (and NO, we never "did" anything...I have my standards.)