Legal Question in Family Law in California

It is impossible to tell you all your rights with the couple of sentences of information you provide. Your exact rights can only be evaluated based on the full financial and transactional history of the acquisition, loans and payments for the house and the sources of income used. What I can say, however, is that if title is in both your names, and income earned by either of you has been used to make payments on the house, she is absolutely wrong that it is ALL hers. It may be 50/50, or it may be some other proportional share or equity reimbursement obligation from one to the other, but it would not be ALL hers.