Legal Question in Family Law in California

You have no right to force her to sign the quitclaim deed. And in fact, if your boyfriend is only legally separated and not divorced, you need some serious legal advice about this whole transaction. Otherwise his wife may be acquiring a share in the property, or may acquire one later. You and the boyfriend also need to have documents in place between you as to ownership and what happens to the property on sale or break-up. By buying the house together you are forming a legal partnership whether you want to or not. You need guidance on this.