Legal Question in Family Law in Louisiana

Assuming the home was purchased during your parents' marriage, there is nothing you can do. Your father owns 1/2 of his own right and use of the other 1/2. Concerning your mother's 1/2, if she had no will then the children get her 1/2 divided equally, but subject to your father's use (usefruct). If your mother had a will and all children are over 23 yoa and mentally competent and she gave it all to your father, then he owns 100%. Even if she gave her 1/2 to someone else, it would still be subject to your father's usufruct.