Q As-salamu `alaykum. My question is about Shari`ah inheritance law and wills. My mother recently passed away, may Allah have mercy on her, leaving 3 daughters. However, in her will she left her whole estate to us and we realized that her will isn't Shari`ah compliant. My father and grandparents passed away many years ago and she has no sons. My mother has 2 full sisters, 4 paternal brothers and 6 paternal sisters.Before my mother passed away her intention was to use her money to pay off our mortgages due to interest. My older sister suffers from mental problems and someone took advantage of her so she had a baby (3 years) who I am raising and in the will my mother spilt my older sister's share with her daughter which we have to put in a trust fund for them both.Throughout my mother’s life she has never relied on anyone and worked extremely hard to provide us a better life and opportunities. My parents got divorced when we were very young and my mother didn't receive much help from her family when it came to raising us.My questions are:1- Are all her siblings entitled to a share of her estate whether paternal brothers/sisters or full sisters? What would her siblings share work out to be?2-Can we act on my mother’s intentions to pay off our mortgages with her money? We want to do the right thing by not dishonoring my mother's wishes to reduce our mortgages/riba, ensure my mentally ill sister is provided for. However, we are also fearful of consequences of not correcting the will to ensure it is Shari`ah complaint.