Let us know when you know your wife is out getting fucked!!!

Various ways. We are heading out together to meet up with someone we have planned for. She is getting reading for a planned solo meet up.
Sometimes she might be heading out just to see if she can hook up, so I know about that in advance, just not who. When she travelled for work I knew there was always a good chance she would have some fun. Occasionally didn't find out until after the fact , sometimes right away, sometimes not.