beta
I think the seme trying to hide one of the side effect of him pouring pheromones on beta. Remember he's a dominant, so it's probably their RARE ability to turns beta into omega, so he didn't wanna say that for fear uke blames him for his gender change? Even though it's practically his fault if my theory is right.
Also it's frustrating to see the uke sure, but I understand his fear and anxiety not to mention he felt trapped and doesn't have a choice due to his son's condition.
I think what I read from korean commenter, there's a tag from this manhwa that usually being used for runaway uke and regretful seme lol so Korean readers suspect there would be an arc where the uke is leaving. But somehow i dont want that .....
I dont want yejun to abandon his son, ahhh this is really frustrating