A Demon-Slaying Curse?! (My Sakuna AU in KNY)

Takara Ryōmen, aka Sakuna's Bride. Known as The Mother Of Curses, she is feared by many, but none know her face. She was the only one protecting her lover in the end of it all, but, during the fight in which Sakuna got destroyed, it was thought that the sorcerer who "exorcised" Sakuna also destroyed her. Oh how wrong they were. She was alive and well, and, after years of hiding, she stepped into the light, disguising herself as a human. "My king... I will find you, and then we can finally marry like we wanted to!" - Takara Ryōmen, Mother Of Curses.
However... Soon after they finally find each other (& her and Yuji Itadori, Sakuna's vessel, get married in place of her and Sakuna), Yuji and Sakuna are killed by the Higher-ups of Jujutsu Sorcerer society, but, using the last of their strength, Sakuna and Yuji send her to a different world while Sakuna also makes her the new Queen Of Curses. A World Of Demons And Demon Slayers... And it's ripe for the taking... Well, after the demon menace is taken care of, at least.