Is it wrong for me to hate her?

Today something happened, I don’t know what to do or how to feel about it. I came home and my mom was in her wheelchair, just sitting in the middle of our living room covered in bruises. It shocked me to see her especially in my house because I haven’t seen her in months. I come to find out that she’s going to come live with us. Her boyfriend apparently put a gun to her head and pulled the trigger three times, (but she never got shot)
It hurts a lot knowing this, but I still can’t forgive her for any of the things that she’s done to my brothers and I. I mean, this is the same man that she’s put before her kids for the past 9 years. She admits that she does it but she just didn’t care was the problem. He’s been beating her for a long time. I feel bad, only because it happened though, I feel no sort of sympathy for her at all… is that wrong of me? She’s known this would happen but she kept going back. Shouldn’t I feel like super ultra bad for her? I just don’t…