
his womb was removed but they had a child prior to that. That's the boy he saw in ch 6 of this manhwa. i might havee used Google translate here so not 100% sureee about the whole novel translation but i'm sure it's their child cos Sooha kept on doing back and forth before he went to the child again. He wouldn't be that anxious if that child is nothing in his life. :)

What AnubisLOve said^ adding onto it:
(If I remember correctly), he let the nanny take care of him since the child was already attached to her. So at that time it was difficult to separate them. Especially while he was still trying to find the MC. After the incident with the MC trying to unalive himself the second time, once he found out the reason was because of a woman again (the nanny) he got angry and kicked her out. The child obviously got upset but gradually got used to both the MC and seme. The MC also had to take it slow due to the fact that he’s mentally unstable and he also had to get used to being around his own child that he hadn’t even met before. If I remember correctly, I don’t think they had even told the kid the truth yet that the MC was his mom by the ending. Mainly cause of how everyone had to get used to being a family together.
Uhh so they’re uncle and nephew and they have a kid.. is the baby okay?