I’m so sorry to hear this update and I also feel for you on the overbearing mom situation. Would it be possible for you to occasionally take your wife and daughter, even if not for every visit? Or a friend who might be able to come (at least on the drive, and you could still facetime your wife during the appointment) every now and then? That might help ease your stress with your mom if she’s not there for every appointment, and goodness knows you don’t need more stress.
Sending lots of positive vibes your way. I hope things start looking up for you.