Why Would Winnie's Mother Leave her Behind?

When I learned that Winnie's mother abandoned her I was shocked. How could her mother leave her alone as a young child and run off with an old boyfriend. Even if Winnie's mother was sad that she was stuck in this marriage she should of brought her daughter with her. In the short time we know Winnie's mother she is a kind and caring person who goes out of her way to help Winnie. But then why leave her? I think the reason for leaving Winnie behind are few and far between but could actually show that Winnie's mother still loved her deeply. I think that Winnie was left behind because her mother thought Winnie would have a better life if she stayed at the house. Winnie's mother ran away with a man who had revolutionary thoughts so her life would not be great if they were constantly being chased by the Chinese government. Her mother showed her love for Winnie by bringing her along on there last day together and they had a great amount of fun. While this plan kinda backfired with the fact that Winnie was sent away to her aunts her mother still good intent in leaving her. In conclusion even though I think it was wrong to leave Winnie alone as a child I think that her mother was actually trying to keep her safe.