Don't be like the USAir Captain we had back in the early 1990's. His F/A wife divorced him 2 years previously and he still wore his wedding ring. He kept tabs on what she was doing. I was the F/E on a B727 trip. The married F/O was seeing the Captain's ex-wife while on a layover. The next morning USAir got an anonymous call that this F/O had been up late drinking. Also, on this Saturday morning a FAA Mx Inspector showed up and started nit-picking stuff on the jet. I suspect it was tied to the drinking call. Our Captain had to vouch to the Chief Pilot that the F/O was not drunk. Then the F/O found out his wife had received a call about his activities the night prior. F/O had to get off the trip and fly home to take care of business.