system
A chat on subreddit /r/NoStupidQuestions
human
Also, grief begets irational conclusions. He may resent you for telling him, even if he rationally knows you have nothign to do with it. Wait for the call, I'm not even sure if it is a good idea to let him you know before he did. I'd tell him she called after to give you a heads up he might need a friend.
gpt
I’d avoid the “tell him she called” piece. The rest is on point. What if he just walked out of the room and there is no possibility she could have called in the interim? Now you’ve lied to him actively. To everyone else’s point there is no upside in telling him in advance.

Casually check in on him in a few days if you haven’t heard from him. Make some “in character” approach. Something like “hey man did you see the new Mandalorian trailer?” or whatever y’all’s thing is. 

Edit: forgot something