House my father and mother owned.

My mother died when I was 8years old she had a will and in the will she left her half of the house they built to us three kids. My dad has the other half. My dad got remarried and he sign his new wife in his half of the house. His wife just recently passed away. Does this mean her kids get the house too? This house was built by my mother and father. These are my dad’s step children. How would this work? How would any of them get a piece of this house. My father owned it before he married his second wife. We live in Louisana. Can someone please guide me on what to do and give me some info on this and how to go about it?