Gail's dad asked Eliza Morgan to stay for Gail's sake, but Eliza replied, "Everyone has their own life, and as a mother, I should sacrifice for my child. But when I think about letting her grow up in a marriage filled with fights, and me crying to her, saying that if it weren't for her, I would have divorced a long time ago, I feel so sorry for my child!"
Eliza grew up in such a marriage... she knows firsthand the impact it can have on a child.
So, even if she couldn't bear it, Eliza decided to leave!
As for her child, Eliza left her behind because she believed Gail's father could provide a better life for her.
Being all alone, when Eliza went out to act in films, she couldn't bear leaving her child alone at home!
So... Eliza had to choose between her child and her job!
Without a job, she couldn't support her child; with a job... she couldn't take care of her child.
After much thought, Eliza made what she thought was the best decision and left.