Selena desperately wanted to live and did not want to sacrifice her life for anyone.
She was selfish, hypocritical, and mean. She was only willing to do some good deeds within her ability if she had a comfortable life, not because of pure kindness.
Selena ran away from her marriage to survive. She killed Derek Norton to be free, and she opened a bar to make money.
She would not sacrifice her life for strangers.
It was a great possibility of being in danger if she stayed here, so she did not