I don’t understand why he is asking ES to live with him when he’s destined to live alone. Maybe they were orphans before and they weren’t as lucky as ES with his mom and dad and the adored little sister.

I hate this kind of people who claim blood is above everything.
We have a saying in my country: mother is not the one who gives birth, but the one who rises the child.
Blood means nothing. I know this. Love is everything.
And the woman EunSeob loves is his mum, not that woman.
I can understand that he took care of his birth mother because I believe she run away to escape his husband and left the boy behind, so he may have thought he owed her what his dad didn’t give her.
And his uncle is just mean. How can he say, “I’ll live with you from now own, leave those people you’ve done enough for them”. It’s like he only wants a nurse to take care of him. I hate him.

Something must have happened to his family before that pushed them to live in seclusion. Both Uncle and Dad were the same. It was natural for them to want Eun-seob to do the same thing. It was out of love but their mentality has been badly twisted from the get go so to them, it was the normal thing to do. No matter how wtf we think it is.