Responses
yeah they will probably have a fight over it when he finds out but at almost 40 years old I hope he is mature enough now to get over it soon and don't make a huge problem out of it. (now I am talking as if they have a mind of their own XD)
I'll play devil's advocate here. Tbh, I think that if Hyesung knew his mom was left alone to fend for herself he'd probably feel very guilty for not keeping in touch. Dojin should've talked to him before stepping to help out, but I see it as a "if Hyesung ever found out, at least he doesn't have the guilt of his mother suffering on his conscious" move