Don't put his mother in an awkward position. If she got the money for you and wants you to know she did, she'll tell you. That was very kind of her. You want to stay on her good side by not pressuring her. Maybe wait to see if she brings up phone records again on her own?
Talking to the priest might be a good idea at least just to have someone outside of the family to vent to.
Other than financial security for the children, maybe you want to think for awhile about whether you are capable of loving this man anymore if he keeps acting this way for so many years.
