Legal Question in Wills and Trusts in Louisiana

Assuming you mean if your father dies, then she has whatever rights he may have given her, such as by donation. If no donation, then she might have a claim for reimbursement for whatever her share of community assets were used on the house, or whatever of her separate property was used for the benefit of the house. Finally, your father can give her the use of the home or the ownership of the home and anything else he dies owning in his will. There may be other claims she could have, but that is a good start.