So, she was engaged to Song San! The whole time when Dugu Wu said "his" fiance died, I mistakenly thought she meant YS. This clears up quite a bit for me. For YS to worry about SH's reaction to Song San taking an arrow for her, must indicate that he's part of the betrayal, whether directly or indirectly (through manipulation); that I don't know.
I think CQ is in the wrong for trusting others over her, but I don't think he has bad intentions towards her. I think someone is sowing discord to eliminate an ally, maybe more.
And, it seems like the Ye fam might have caused this explosion? hmm
enemies on the loose... The Matriarch? Chi Qing? being blinded by love, jealousy, power or whatever, Dark Angels? The Su? from unknown island, they are too many of them who wants you dead...
Song San is the 2nd male lead, hahaha