Betrayed by Him, I Married His Dragon King Rival

My fiancé framed my whole clan and had us slaughtered. Then I woke up on our wedding day. So I exposed his mistress's pregnancy, smashed the ring in his face, and proposed to the Black Dragon Lord standing right there in the crowd. Turns out he never forgot the girl who saved him as a kid. Now he's the Dragon King and I'm his Empress.