After Swapping Brides, I Marry the Slovenly Young Lord

What? After settling the Yun and Xie families, Liu Xiang, the mistress from Qin Xiu's senior sister's novel, returns from the border to cause trouble? Hmph! Yun Qing sighs, feeling annoyed. Fine! If Liu Xiang is causing trouble, we'll slap her face, simultaneously punish Qin Xiu in creative ways, engage in a stylish fight, and love creatively. Liu Xiang's master is the Crown Prince? She secretly poisons Qin Xiu, hoping he and Yun Qing will divorce so she can seize the military power of the Duke's Mansion? Yun Qing pats her head, ideas coming one after another, protecting the Duke's Mansion with strength and love while the whole family enjoys warmth and humor. The villains cry and beg for mercy.