Is my mother trying to play mind games with me? by saying im waiting for grandma to die?

I am very close to my mom and grandma. They both live together and helped us get our house. My children spend every weekend with them, and anytime they need anything my husband is the first person they call. Both my mom and grandma have co signed student loans for me. I am enrolled in school so they should be in deferment. I have been struggling trying to get them consolidated since July. There was 1 that didn't get consolidated, and I 100% am behind in. Im making small weekly payments to get it caught up, because my husband lost his job and i am currently not working, but i am taking care of my grandma. My mother called today telling me that this company called threatening to take us to court. I see how that is upsetting, but i have shown her proof as to what is going on, Then she says to me. Well your grandma thinks you are just waiting for her to die, so these are taken care of." WTF! I do every thing for my grandma. I helped pay for her meds this month with my taxes because she couldn't after all she has helped us. I bought her groceries, and dog food as well, and gave her 100.00 She needed it.and my husband bought and installed new brakes and tuned up her car that my mom has been using since grandma doesnt drive anymore. For my mother, i paid off 2 of her high interest rate credit cards but it isn't enough for her. Im screwing her some how. Then she throws out that she owns my house, and doesn't know that im paying the mortgage around here, or propriety taxes. because i don't bring her the receipts.?? Really, last year i put a 8000 roof on this house? a 5500 gas line repair, and all new appliances. Then before he lost his job, i had new duct work and a new furnace. I'm ready to tell her im out. I want to move so bad, I have an aunt and uncle who are so involved with their own lives that they don't care or do a thing for gram. I want to go over there, and say well since im just waiting for you to die, then maybe you need to call my cousins to come take you shopping take you to your Dr's come do your meds every saturday, and fix everything that goes wrong here. You know, since i am just waiting for you to die. Im hurt, what do i say to my know it all mother? what do i say to grandma