Legal Question in Family Law in California

You were "toled" wrong. If any income during the marriage went into buying or paying for the house, she has at least some claim to it. Exactly what her claim is and how much depends on a lot of factors and accounting that can't be done without examining all the details of your family finances. As for whether she can force you to sell the house, that depends on whether you can afford to buy out whatever share she has in the house and then make the payments yourself. If not, you will have to sell.