i went back to read from the start again and it sucks that before they could even finish the hurdle of kouchis magical womb and bussy, they jumped to this egg hatching arc and left it behind
That's why my theory has the both of them together. They didn't say if he would look pregnant or how long he would be pregnant so what's to say the egg will hatch either just before or after Kouichi has a baby?
i went back to read from the start again and it sucks that before they could even finish the hurdle of kouchis magical womb and bussy, they jumped to this egg hatching arc and left it behind