(((Carolyn))) I'm sorry this triggered you. Can you discuss it with your SIL? I mean, like you did above? It might help him control himself better.

As for you... well, is it really a daily fear? Or maybe just now it's daily since the trigger is so recent? (Not minimalizing it, just wanting you to evaluate it fully.) I think the years of therapy has helped you. What kind of reaction did you have to the yelling? Yes, it effected you emotionally, but were you still functional? You seem more in tune with the grandson and his reactions, than worried about yourself. Keep talking to us here at PC. (((hug)))