Sweet Desire

"You will regret this Mei Su Fei!" cried Li Shimin Bide as he watches her clean close. "Sweet desire are like poison to one's soul," reply Mei Su Fei while giving him one last sweet kiss. Mei Su Fei steps back and fell into the icy river below. Li Shimin Bide grabs his chest as if he was in pain. The cover is made graciously by @yaoyueyi What happened to the two? What events led up to this moment?