My mom is a bitch

So, my mom is such a bitch. My dad has heart failure, he was told yesterday by his doctor that he needs heart surgery to fix a leaking heart valve, fix a possible blockage and a-fib. She was just telling me a couple months ago she was thinking of leaving him because he wasn't paying her the attention she wants and that he doesn't care about her, blah blah. All lies. They've been married 38 years. He's worked all his life to take care of her, she's always stayed home. Hasn't worked since I was a baby, I'm 34 years old. She treats him like crap. He tries to show her love and she pushes him away, he tries to kiss her and she turns her head away. The doctor told him he might not make it through the surgery because his heart is really weak. She gets on Facebook and tell everyone thru a status update, people were saying sorry and they would pray everything goes well and she seriously had a nerve to say "yea, well I'm just worried we want make it, financially" I was like for real, he could die during this surgery and your worried more about money. She don't care about him. She still there cause he pays all the bills and takes care of her, if she leaves, she's screwed. Then she tells me I don't care about them. I've always helped them, weather it be moving so they wouldn't have so much to do or hurt themselves, helping with my aunt that was sick, telling her they need to get my brother and his wife and 3 kids out of there house because they're health can't handle the stress and bullshit my brother is handing them. But I don't care?! Says I didn't go see my dad after surgery when he had cancer about 11 years ago. I couldn't go see him in the hospital because we only have 1 car and my husband takes it to work everyday. Hospitals freak me out also. But I most definitely went to see him after he was home. Several times. She says I didn't. Says I've treated her badly, I haven't. She was super stricked in me as a teenager, she kicked a boyfriend out because she kissed me, one little kiss and she freaked out on us. So she wasn't the easiest person to get along with but I was never a bitch to her. She never wants to hear the truth. She shuts down and get rude. She never ever texts me to see how in am or just to say hey or ask what I've been up too. I'm always texting her, always. Sorry for the rant but I needed to get it out. I just don't know what's wrong with her and why she's like this. I'm seriously thinking about cutting all ties. I'd hate to but what else can i do, ya know? Ugh..