why does abigail refuse to go to the cereomony that night?what does she tell lindsey

Lindsey realizes they are having a ceremony for Susie. Abigail is not interested because she is “done” with that. She tells Lindsey she wants to be more than a mother. Lindsey asks her if she is going to leave. She lies and promises she won’t. She holds Lindsey and tells her she is helping keep her father alive. Jack pulls into the driveway. She then tells Lindsey to get her father.