Just a thought...

チャ . When things didn't go according to her plans or she doesn't like the result, she'll just decide to go, leave, and doesn't care what she will leave behind. Like her mom, when she decided to go or feel like going, she'll just leave without thinking what would the people she'll leave behind feel. It's somewhat running away with unfinished business. It's somewhat selfish and not. Selfish, because, she just go without informing the people first. Not, she thinks it's for her own good. It's not selfish to think about oneself.

Then I remembered Sam. He unconsciously replicating the life or the choices his father made. Though チャ is saying she's not her mother, but unconsciously, she's doing the same what her mom does. She may doesn't like the personality of her mom about running away, but she's also doing the same thing. One needs to exert an effort consciously to not replicate the choices we don't like about our parents' life.