I am an unmarried 22 year old girl in college. I have a mother, father and brother who is also doing his masters in college. We live in India and all stay together in a flat. I'm the youngest in my family and often observe a lot of things. My mom's mom has 2 daughters. My aunt is in the US and is very successful and wealthy as she married a rich person. She is also highly narcissistic, selfish and her behaviour is often (strong word to say but) cruel. My grandma is a greedy person and loves money. She hates my mom and speaks cruel things about her. My mom is a very emotional, loving, caring and forgiving individual. Grandma and Aunty together bully my mother. They also hate us, but they don't show that directly.
After my granddad passed on, Aunty dumped Grandma at our place, as she did not want to take any responsibility. We accepted it quietly. My grandma always emotionally blackmails my mom (because she knows she is emotional) into doing things for her which are impossible to do during COVID. She says a lot of hurtful things and makes a very big scene by yelling, screaming and crying. Everyone in the apartment hears this and is very insulting. She has no regard for us children that we have exams and need to study.
Recently, while I was getting a glass of water at 3AM, I found Grandma and Aunty plotting plans for breaking relationships of me and my brother and with my mother, saying horrible untrue things about my father (in whose house she lives and eats), and talking very very nasty things about every single thing of our home. Aunty tells her exactly what and how to say and do. What hurts me the most is seeing all these extreme negative and hateful feelings when we have been nothing but good and always put her in such a good place. We all work hard to keep her comfortable and be nice to her despite the horrible things. Aunty has always been jealous and vindictive towards us, even though she stayed at our home and ate our food and we kept her very nicely. She now dictates to Grandma how to manipulate and hurt us.
I told my mom about this and she cried for hours (we knew they hated us but we never knew that they are actively plotting like this behind our backs). A few days have passed but I am still sad, hurt, depressed and in such disbelief. I don't know what to do and feel helpless. If we say anything, Grandma cries and yells and denies everything. It seems impossible to me. How can we deal with such a painful situation?