I understand why some of you were upset. This bothers me as well. I'm not justifying Taejoo's behavior. But keep in mind that he's in a rut, and we all know that an Alpha in a rut isn't in their right mind. They're basically going insane. I mean when our omega was in heat, he wants Taejoo to get him pregnant, remember?
I'm sure Taejoo will be sorry once his rut is over.