I am on the other end of estrangement. One of my adopted sisters is estranged from my family. I have a lot of siblings and a few that are adopted. She never liked my family even though she was given the option to be adopted and could have easily said no.
She hates me to the core. Any chance she has she will tell others how much she hates me and my mom and honestly the rest of my family. It's sad, and I wish it didn't have to be like that, but I still want her to have the best in life (even if I never get to be in it).