I don’t agree with giving him a heads up, he could work out all sorts of excuses and ways to spin it without actually admitting to everything with all the extra time he has to get his story in line. Just tell her with some screenshots as evidence and let her decide how to handle her husband.
Wow buddy, you're pretty hostile about this.
Do you have a problem with women or just hostile in general?
I don’t agree with giving him a heads up, he could work out all sorts of excuses and ways to spin it without actually admitting to everything with all the extra time he has to get his story in line. Just tell her with some screenshots as evidence and let her decide how to handle her husband.