Am I crazy or being bullied or normal?

My elderly mom, 78 ish, broke her hip three years ago. Since then, she refuses to exercise and get healthy. She is still in a wheelchair due to this.

She also has diabetes but refuses to lose weight or eat the right way.

She is stubborn and has lost hope with life. But she's been unhappy most of her life, I think.

She lives in an assisted living apartment. Her rent and food are paid for via social security and my dad's pension. She has been retired since she was around 55. Not worked since.

She's now telling me that I am hateful and bad because I don't send her monthly checks any longer. This is because I found out that she has nearly 100k in the bank. She says well she needs my money because she doesn't want to spend that 100k. I am struggling financially myself and will be forced to retire on 1700 a month or less. Sending her money makes no sense.

I told her to please spend her money. She only needs about 200 a month for things other than rent/food. That's say 3k a year. Times 20 years, she'll still have plenty of money.

I have always been the hated/black sheep daughter. She says mean things to me often, and I have never felt really loved by her. My sister is the golden child; my little brother the only boy. I am really tired of how she makes me feel. She and my sister used to laugh at me cruelly when I was a kid. They still stick together today. I think both of them are coldhearts.

thanks