He and his wife treat her like piece of toilet paper stuck to their shoes. They are awful people and should not have sympathy for the way they take out their frustrations. Him working 2+ jobs to keep the house afloat will never change that. That's just normal for a lot of people unfortunately. The way the kids are treat is not! You can feel sorry for the family financial situation but the parents' attitudes are another ballpark.
I thought he meant he fell in love with her when they met at the ball and he called her a dog(that was kind of funny but also very weird when it's revealed that he knows her and is in love with her). But no, they met as kids ( ̄へ ̄) I read it in so many stories, especially in Chinese manhua and I'm just not into it. It's not how I want the characters to be "fated to be together". It takes away some of the spontaneity of the romance for me. And it has also felt randomly added in some stories.
Heeseung?? You on a date with Potato? Hehe.