My girlfriend's ex-husband is threatening to force the sale of her house. He quick deeded the house to her 5-years ago, because he felt this house really belonged to her and he was tired of paying the home taxes on it. Note that he was required to pay the taxes on the home, per their divorce decree, which occurred 10-years ago. However, he is unhappy that I live in her home now. Therefore, he is insisting that he has the right to force the sale of her home. Note that their divorced decree from 10-years ago states that once her youngest child reaches the age of 18 or once she (my girlfriend) cohabitates with a member of the opposite sex, the home would be sold and proceeds would be equally shared. Both are true; but does he have the right to force a sale of her home, once he decided to quick deed the home to her because he did not wish to pay the taxes on the home?