If hyesung were in his mother position he would not have left byul behind to escape the situation he was in alone. Hyesung would have already built a relationship with byul and we know hyesung loves byul to death. Theres absolutely no way he would've left his precious son with someone who wouldn't hesitate to exploit others. Thats the difference between hyesung and his mother. Ntm there's that already built bond, leaving behind a newborn you barley know is different than leaving behind a child who you raised for years and had time to build a relationship with
I think that’s something that’s too much to assume since that wasn’t the situation that Hyesung faced. What we did see was that during the small cheating scandal and the drama with his dad; Hyesung shut himself out. This wasn’t after Byul was a new born, he just simply already was excluding himself; and it was Dojin that created that effort and space for Hyesung to constantly return during these moments.
It is when Hyesung “sees” his mom again that he almost realizes that he can fall into the same position and says he does not want to ever have that with sort of relationship with Byul and appreciates even further how his life is now.
Point is I truly feel for his mother, I feel for Hyesung too; and I really like how the author is writing all these characters. Parenting is hard, families are tough but with grace and understanding we are able to not just blindly blame OR forgive but move on.
uhhh. his mom left her with his abusive dad! he was neglected and unguided, forced to survive on his own and forced to carry a child when he's still a child himself. hyesung didn't want to be like his mother and embraced and raised byul with support and genuine love that he didnt receive as child.
trauma was so obviously resurface and used for the plot and im not gonna be surprise if the author may or may not intentionally give the mother an excuse sob story as its reason :3 (which might be pathetic)

Am I the only one that doesn’t feel Byul or Dojin purposely wronged Hyesung?
His mother did abandon him but let’s be honest if his circumstances were the same would it had been different for Hyesung?
He was young but he also had a much better opportunity than his own mother. he had someone who wanted a family with him & let’s not mention financially well. & i think that’s what byul is saying and i hope they all understand eachother better.