He's pissed

I just got a phone call from my exN. He asked if I had talked to his friends about our situation (filing for divorce because of his infidelities). I told him I spoke to one of his friends wives who had reached out to me when she got wind of the situation. He immediately got pissed at me. I sunk back into the quiet person I become when I'm around him. He's at my house right now packing up the remainder of his things to move to the garage before his big move next Friday. He couldn't let the conversation end there. I just received an email from him stating I was to cease all communication with "his friends" going forward. The email was rude but typical of him.

I did not respond to the email. Is that the right thing to do? I don't plan on reaching out to his friends but I can't help it if they reach out to me. Do I need to ignore the wives? They are my friends too.

Do you think I should change the locks on my house even though he is returning the keys? I need him to stay pleasant for about 3 more weeks until the divorce papers are served and our marital agreement is signed.