You really need to speak to a local attorney. This gets very complicated. Things like was his estate probated? Is one question that comes to mind.
This board is for general questions. You need to seek competent counsel
I take care of my mother since 1994 when my dad passed im the only child of 8 that takes care of her and i have been putting all my money and time in her house and keeping her up and she doesnt have a will and his and her name are on the deed to the house and he has 4 other kids from a other marriage. My question is what happens if she passes with no will and i have all this time and money in this place. What will they be intitled to if she does . Thank you.