I think It was explained from the pRevious chapter.. she wants the si patriarch to owe her a favor not for herself but for mu feichi(She thought that if something goes wrong ahe can use it to help Marshall Mu)
Ch 422 No Choice Since You Have Me Wrapped around Your Finger
Imperial Commander: His Pretty Wife Is Spoiled Rotten
Is it just me or has anyOne here feel that this is getting boring?im sorry author but this jewlry thingy is dragging the story long..i dont mean to dishearten you