I am sorry that things didn't go as smoothly as you hoped. Your brother is supporting his wife and taking her side as most married couples do. He hasn't separated himself from her. I would suggest giving support and maybe not going deeper just yet.
He hasn't given up on his marriage. Maybe you should give him DB or DR and let him read it. After all he knows his marriage and his wife and may be able to see things you guys don't.
Hang in there NC. I am hoping the best for you and your brother.
kat
Me-53(and learning!) S24, S21, D18, D17 Just keep swimming, Just keep swimming. Dory