I feel like my mother chooses her youngest sisters over me

Me and mom would have a plan together but soon as her sister calls she break our plan together to hang with her sister. my mother has 5 sisters but some reason she can’t say no to 2 youngest. my mother told me how her mother spoiled the 2 youngest. my mother is so scared of saying no to them. it’s strange and kind of scary. I don’t know why she terrified of them. I remember way back when she said no them I heard one of aunts screaming on the phone at her. my mother start crying. its really bad. not once my mother broke plans off with her sisters to be with me. I was in the mental hospital my mother came to visit me for 2 min but had to leave because her sister wanted to go to bingo. There has to be a reason why my dad hates their guts. I’m scared to even ask her why she always have to say yes to them.