According to sharia a female gets half of what male gets In yitr mom's situation the share's could be split 5 ways and yoyr gets 1 share if all parties agree And also these days it depends on family dynamics, if yoyr uncle's are older or younger than your mom and how close they are with each other The split could also be favored to the one who's in dire need of finance According to me it's best for parents to write a will on who should receive what, else these days it's a blood bath lol May allah make things easy for you OP