they did but then her husband which is the "goblin" kill the "crown prince" and pretends to be the "crown prince", he also promised to the wife of crown prince that she will be the empress. Then when HE found out that heonyoung is alive, she makes her his guest/concubine. It just doesnt feel right for me though it is quite "understandable" since heonyoung doesnt any traits that can lead a country.
before she became the empress, she is actually a battered wife. The night the "goblin" came, he ask her that she will still be the empress as long as she keeps her mouth shut since he plan to kill his twin brother, he promised her the throne and she wishes that the crown prince is better be death. So I think, we can call it they are more accomplice. Heonyoung is legally known as the Goblins Bride so i think she that she knows who heonyoung well.
OMAYGOSH ALL THIS TIME I WAS ACTUALLY USING A WRONG NAME T.T Pardon my dumb ass brain, HEONYOUNG is actually the GOBLINS NAME and our FL name is Young-an...
ANYWAY HERE'S THE LINK OF WEBSITE THAT HAS THE COMPLETE CHAPTERS..
https://m.manganelo.com/manga-jz123619
I was just sad that at the end Heonyoung became the "guest/concubine" because there is already an "empress", it feels like she became a mistress :(( it is much more better that she is the QUEEN of the Goblin