"Because Huang Xue is your niece."
Musheng slowly voiced her conjecture.
She could never fathom why Mu Youqing had an affair with Huang Xue, but now she finally understood. After all, Mu Youqing was her father, and she knew some of his character traits; there was not a single redeeming quality in Huang Xue that could be worth Mu Youqing's attention. The only reason for him to have an affair with Huang Xue was probably to learn her whereabouts and place a pawn that could stab her in the back at any moment.
Huang Xue was Shanbo's niece, which precisely indicated how Mu Youqing came to know Huang Xue.