Spoiler alert They gonna have boy and girl twin and this is so worth reading ...

How did you know?
Where did your highness read it ?
Please enlighten us?

https://tkor.bid/%EC%A7%80%EC%A3%BC-%EA%B5%AC%EC%8A%AC%EC%9D%84-%EA%B0%80%EC%A7%80%EB%8B%A4#
Here you go

Suit yourself. Theresgonna be a rough ride before seeing the two angels.