when I first read this I thought the seme is not the uke’s biological son??? but then my brain gave up thinking about who’s who in their family tree.
It's safe to say the seme ain't uke's son cause his husband had the son with another omega out of an affair while he was still dating the uke. It's not the uke's son. He was kinda forced to take care of him cause his husband forced the young child to him when he wished for a baby of his own I think.
just call them both dad ,clearly they will not tell their child .for what telling him?is that necesarilly, joowon is not blood related to his omega dad
I'm just imagining how confused the child will be after birth, about whom he should call dad, grandpa, brother.