After Eun-Sun left work at the Tulip palace, she decided to visit her mother. It's been too long since she last saw her. If she remembered correctly she hasn't seen her since the night of the accident.
She had tried calling her mother after the incident with Byung-Hun, but her mother had made it her life's work to hate her so much that she had refused to take her calls.
Eun-Sun had tried her best to hold herself from calling her, but the more the tried, the more she found herself thinking about her mother and also desperately missing her.
Although their relationship was a bit strained, she still loved her dearly and she knew her mother loved her too. Her mother was just heartbroken and she needed someone to vent her anger on.
Eun-Sun didn't mind being the target for her mother's anger, even when she felt hurt sometimes - let's make that every time - she still wouldn't mind. Everything was fine as long as her mother was able to vent.