Looking for information on a divorce?

my mother is in the middle of a divorce, and recently my father has introduced his new woman with his last name. It's possible that they managed to get married or that my mother got shafted and the divorce went through without her knowledge(but they both have attorneys in texas where they are legal residents). Who do I contact to find out this information and assuming there is an issue would they know the next people to take the next legal step to get things in order.