To be honest to her. Ask your husband to tell her 相見好,同住難. Tell her a pregnant woman sometimes may have emotion and she may not be able to stand it, and both of you don't want to break the relationship. By saying this she should be able to accept.
is it possible to live with your mom for a few months until you are emotionally accepted to live with her or until your baby aged around 6 months? At that time, you conditition is more stable....
我鐘意你同我講 I Love U, I Love U Too!
You are the sunshine of my life. That's why I'll always stay around. You are the apple of my eye. Forever you'll stay in my heart.