Kate is such a *****!
Ok so we have Anna, the once born to be a walking donor for her sister, we have the mum who has neglected everyone in her family and used and abused her youngest. then Kate decides she wants out and instead of having a backbone, uses her own sister to sue he parents. right lets see her list of crimes against Anna
In the beginning, we see Anne pawning the necklace, her father gave her to afford a lawyer. in the flashback we see Anne wearing said necklace indicating it was important to her. No mention of Kate selling her belongings at all. One of her first selfish acts
Putting her own sister through a court case, in which she is openly abused and hit by her own mother.
Though Kate apologises to Anna saying "I'm sorry they hurt you", right because of you, she is going through more pain.
everyone single person abuses Anna, and just because Kate is the one who is dying doesn't mean she gets a "get out of jail free card". She is just as guilty as the parents for what Anna went through.
Thunderbirds Aren't Slow