beta
I think they both need to grieve together for the lost of their child. There were a lot of people hurt in this story because of the Eunji's dad and Hyuntae's grandpa but undeniably Hayoon and Hyuntae's child is the most tragic of all the victims of that plot. An innocent bystander who's only "sin" was his relation to his parents. That chapter where Hayoon was able to see him was so bittersweet.
And I can somehow find it in my heart to forgive Hyuntae because unlike Hayoon who was able to "meet" their child Hyuntae was not given that chance at all. I think he also knew he does not deserve to meet their child in the way that he had admitted that Hayoon's pain is much greater than his. At least that's how I read it.
They've tried to grieve apart and clearly it didn't work so try and grieve together. The pain of losing a child might never go away and will never be replaced by another but they still have each other.