MNIONC: I texted this brother last night and said that we need to talk THIS WEEK. He texted that he would get back to me. We'll see what happens.
No, no, no!
You're still letting him control the frame.
YOU need to take control or you might lose your son.
Do you think we're kidding here?
You came here asking for advice. You've got dozens of people that has been through similar situations. For most of us it didn't work out well because we didn't know what to do. We're trying to help with our hard-won experience and you're not listening.
Tell that brother in no uncertain terms to stay away from your son and your wife. Do it!
No more "we'll see ..."