I feel bad for him Being sold to someone to cover his brother off and I think is that the little brother is actually scheming a long time ago when he heard about him getting engaged
I feel like the theory I read on the previous chapter about the pregnancy thing is a bit off cause He's a recessive Omega and that it's hard to get pregnant for him but since the husband is Hyper (I never heard of it but it too the Dominant so Maybe it could work?)