You're right, maybe he was just curious. Also, let's not forget that Hyesung's mother was abused by her husband, And she won't be the first or only woman who decides to leave an abusive and deplorable place and abandon her children, I can imagine how difficult it must be to take care of someone when you can't even take care of yourself
Yeah. It's difficult. But she also remarried and left Hyesung, a child, by himself with an abuser. She even returned to that house to ask for divorce and didn't even look for her child. She even had the audacity to blame HIM for not looking for her.
Someone could understand her if she was escaping alone so she could first find somewhere she and her child could live, but she chose to hide the fact she had a child, marry someone else and rebuild her life as if Hyesung didn't exist (She later got divorced again because that family found out about Hyesung, so at least there's that, lol)

Byul can be forgiven but Dijon mustard cannot. He has no right to decide when His partner should have closure with his own mother. Byul does not have full context of what his grandma did to his mom and his dad facilitated their meeting. This is all Dojin's fault!!
So much of the bullshit that happened and what affected Hyesung's decisions can be traced back to his mother's abandonment and father's abuse. I cannot believe that the author is writing it in a way as if what happened to hyesung in his childhood didn't severely affect him later. It is inconceivable that his very own partner cannot be trusted with his trauma!!!!