divorce and comortgage

My daughter was recently divorced and obtained the house they bought while married in the divorce settlement. She now has the deed of trust in her name only. Unfortunately, the mortgage is still in both of their names. She is making payments on her own but the mortgage payments now constitute 51% of her take-home pay and she is struggling. She would like to rework the loan but they tell her she cannot unless she starts defaulting on payments and she does not want her credit pinged. She is also worried that her ex will file bankruptcy again and this will affect her home despite never being late on payments and having excellent credit herself. (Her ex filed bankruptcy once before prior to their marriage. He is not very good at handling his financial affairs.) Anyway, is her credit or home in jeopardy if he does file again? She lives in Texas. Thanks.