I don't know how to feel

It's a long story but my sister and i have not talked or seen each other for almost a year. We were always really close but for some reason now she hates me and i honestly don't know why. She kicked me out of her apartment by changing the locks even tho i paid 1/3 of all bills. She took what she wanted of my property and threw the remainder away. She tried to get me fired from my job by calling them and accusing me of stealing from them. Thankfully they did not believe that story. She lies to mutual friends of ours about me making up stories that aren't true. The other roommate that we had is bullied and doesn't get along with her either. The roommate called me this morning and told me that she had to take my sister to the ER. They ran tests on her and she has been diagnosed with brain cancer. They said they don't believe that her chances are good. She told other family members in the past that she hates me and wished that i would die. She doesn't want me at the hospital nor anything to do with me. It's upsetting to me even tho she done me really shitty. I honestly don't know how to feel.