Would it be best to be keeping record of my time/ money being spent from my mother-in-law's (90) account?

Family not helping with mom at 80 had a stroke she is now 90 has diabetes hypertension thyroid heart murmur glicoma sleep apnea and now needs help for ordeing and administering meds purchasing toiletries food sanitary supplies bills being paid , cooking driving to / from appointments . cleaning of house we help pay to have a sitter come in on occasion while I attend school functions for 13 yr old son or doctor appointments errands for self . I've lived with her since stroke she recovered for about two years later started showing signs of memory lost bills not paid . driving into unknown area mood swings paranoid it was hard her family wouldn't listen when I metion this behavior. So stressful after I had enough she was having blood sugar highs 400 and low 36 I took over and got her to the doctors myself . been I've been taken care of mom inlaw for last 6 yrs she was diagnosed with dementia within the last 3 yrs my hubby ( her son only son) works .i stay at home with mom she has Medicare / SS her kids thinks she receives thousands . they don't have a clue and i truly feel they don't care wow )n just trying to protect myself and my family