Should I feel guilty for talking to my ex husband at 3 in the morning when he has a wife?

I have 2 kids with my ex husband and he has one with his wife. We don't hate each other. We co-parent decently. We've known each other since we were 12. I knew about a lot going on in his home life because my parents would talk about it. His dad was a bad person and was molesting him and his brothers. He went to prison after one of the brothers spoke up. I know everything and was the one who convinced my ex to see a therapist. He called me last night at about 3 something and woke me up. He asked if I was alone and if he could talk to me. I said sure. He said his dad got out of prison after 18 years and his mom took his back and then he started crying saying he doesn't know what to do and he wants to hurt himself. I don't know why he called me instead of waking up his wife but we spoke on the phone for over an hour and he calmed down. I convinced him not to self harm. This happened last week and we haven't spoken about it. He hasn't messaged me about anything except the kids. Should I feel guilty that I spoke to him. It just makes me feel weird that I was comforting my ex husband while his wife was sleeping. I'm assuming he called me because he knows I knew everything.