I'm not 100% sure, but I imagine that if she's married to him still and there's no legal order of separation that she should have a right into their domicile.
Upon marriage, each spouse enters into an agreement to support the other. Each spouse is committed to using whatever resources are available for this purpose. If there is not adequate community property to provide support for your spouse, you are expected to expend your own separate property to support your spouse. (Fam. Code, § 4301.)
California has community property laws. If you lived in California during your marriage, everything you or your spouse own is either "community" or "separate" property. Unless you and your spouse agree otherwise, all property in or out of the state that is acquired by you and your spouse through either of your labor or skills during the marriage is community property. Each spouse owns one-half of all community property. This is true even if only one spouse worked outside the home during the marriage and/or the property is held in the name of only one spouse. If you were married in a state that does not have community property laws and while married, you and your spouse purchased a home or other property in that state before moving to California, the house will be treated as community property when you get a marriage dissolution in California, if it was bought with the earnings of either or both spouses during the marriage. This kind of property is called "quasi-community property." (Fam. Code, § 125.)
During marriage, both husband and wife have an equal interest in all of their community property. Each spouse has the right to manage and control the community property for the good of the family. This does not mean, however, that either you or your spouse may sell, lease for longer than one year, or give away real estate or personal property acquired during your marriage without written consent or the signature of the other, with certain exceptions. "Real estate" includes a home, land, or rental property. "Personal property" includes furniture, furnishings or fittings of the home, clothing, cars, money, and other personal goods. Each spouse owes a duty of good faith in dealing with the community property. This fiduciary duty, which continues until a petition for dissolution is dismissed, a judgment is entered or the court makes further orders, or the death of a spouse, includes the obligation to make a full disclosure to the other spouse of the existence and extent of all community assets and debts. This obligation can be enforced through a court proceeding brought within three years of the date a petitioning spouse had actual knowledge that the event for which the remedy is sought occurred, although these time limits do not apply where a spouse has died or there is an action for legal separation, dissolution or nullification of a marriage. (Fam. Code, §§ 1100, 1101 and 1102.)
