I don't think you should tell the wife unless she suspects and asks you for information. She has a relationship with her husband that you may or may not understand. However, you SHOULD make clear in no uncertain terms to the friend that his behaviour is not acceptable. Since you've already done so, I don't think much more needs to be said.

Whether you go out with them again depends on whether you value the friendship enough to keep trying. If the incident doesn't repeat, I'd say put it behind you. Honestly, I don't see this as a big deal. Maybe the friend was having a bad day or suffering from severe stress. People do dumb things. I had a quasi in-law hit on me when his relationship was potentially on the rocks and he was drunk and in pain. I made clear it wasn't on and it never happened again. But they didn't need me to get involved in whatever relationship issues they had.