I don't understand the ending. SPOILERS. It seems the FL died, but what was the card in her sister's hand and how could it help the FL? My assumption would be that she is a match for bone marrow and she had decided to donate to her, but the FL flatlined already. I don't understand what she was going to do for the FL. Also, why wasn't she in prison? Everyone just let her get away with her crimes? I'm confused.