The action you took could back fire in your face. How?

1. It could very well push them together even more so. He may opt to get a place of his own and have her come live w/him.

2. He very well may now push for a divorce...the sooner the better.

All I can say is this, he is going to be furious when he finds out. Are you ready to take that anger on this morning?

Laying the serious stuff aside, you sounded more like his mother than his wife when you mentioned that you would send the PI information on to her parents. You've got to get yourself out of the "mom" mode. You are not his mother. They are two consenting adults and most likely don't get a rat's behind what her parents think. She will find a way to spin the web to make it look like you are the irrational one in this mess.

I suggest that you now step back and allow the drama to unfold that you have set in motion. I advise you to be prepared for his anger and the threat of a divorce very soon.

Sit quietly, the answers will reveal themselves when you least expect them to.
The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.