Base on the omegaverse I have read before, omegas usually have a low fertility rate except for when they are in heat whereas betas have a high fertility rate all year round.
Since in the next page the subordinate states that he doesn't think its strange for his boss, an alpha, to be married to someone not of the "same type" he must have thought Masaki was an alpha as well. Another reason to back this up would be that the "alpha status" is like nobility status and nobles like to keep the bloodline pure.
Thanks for the responses! I just read the notes explaining how the omegeverse world works in another omegaverse project and it turns out that alphas,betas, and omegas can all get pregnant with Betas having the higher percentage of pregnancy.
Okay, first of all this is literally one of my favorite mangas of all time but I have a quick question. So on this page http://www.mangago.zone/read-manga/tadaima_okaeri/uu/tadaima_okaeri-chapter-1/12/ it shows the guy being very surprised that Masaki (blonde guy) was an omega. They know that Masaki and the Boss have a baby together and are both guys but he was surprised that the Boss (alpha) had a baby with Masaki (omega).So did he think that Masaki was a beta? I was under the impression that only omegas could get pregnant. Can beta's get pregnant too?I know that Beta's can get omegas pregnant based on another omegarverse manga but does that mean betas can pregnant but at a much lower rate? Any information is helpful.Thanks!