ok now get the ratfuck who set all this up
Aren't there two people? The scumbag #1 who, against junior sister's orders, attacked the justice league clan and is now enjoying the protection of that very justice league, and then Si Hyeon's so called fiance, who fed the latest lies to her.
All that being said, Si Hyeon isn't a very good leader of a sect at all, so she should leave that position, whether she's the heavenly demon or not. In fact that whole Heavenly Demonic Cult should be scattered to the winds. If it has any decent members, maybe they could be recruited to fight against Muncheon, but otherwise the sect deserves to be disbanded.