Your priority is supposed to be with your wife and child, not your your parents. That doesn't mean abandon your mom, or stop talking to her, but you are not responsible to her any more. You ARE responsible to your wife. No marriage in which one spouse is more attached to their parents than the other spouse can last.

You have a family of your own now. They should ALWAYS come first.

Decide quickly where your priorities lie. If your mother is your priority, then you need to let your wife find someone who will actually honor her in marriage.