What do I do about this unfair situation?

When I was 18 my mom divorced my stepfather after nine years together. My mom raised both my sister and I as a single mom. My sister ended up marrying a unstable husband who didn't want to financially support my sister and their child. My mom and I would've got an apartment and I would've been more responsible than I am now. My mom decided to have us all live together for my nieces sake. I told my mom it wasn't a good idea but my mom wanted all of us to live together. I knew that my sisters husband had to become responsible. Fast forward to 9 years later my mom decides to buy a house. I told her it wasn't a good idea and my sisters husband should become responsible. At this time my stepfather and her decide to get back together. We never bought a house so I didn't know all the financial responsibilities it came with it. Well now it's been about 10 years in that house. I have worked for most of the time and paid rent. Everyone else chips in just for rent. The house also needs repair and I haven't worked for 4 years because of a health condition. My mom has paid the repairs this past years on her own. When we rented this was never a problem. I really like my room so I dont want to move out. Well I visited my crazy opinionated aunt and she says that my sister and I dont support my mom.

Updates
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My mom tells my aunt everything and I can't stand my aunt because she doesn't like me. She hates me even more because I've been unemployed for 4 years. I didn't do anything to her. She got mad and told me I needed to go work and help my mom but I have given my mom some money each month from my savings for the past two years. This lady has no compassion for my health condition. I looked at the situation and notice that my retired stepfather, my sisters husband or my sister dont pay for repairs.
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I find it unfair I would have to pay extra even after I told her not to buy the house. I feel it's also because I'm not married and have no kids.
What do I do about this unfair situation?
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