Furen Ni Majia You Diao Le

Her mother keeps telling Qin Ran, "Your stepfather comes from a prominent family, your stepbrother is a genius, and your stepsister is an honor student. A country girl like you should be careful to not embarrass them." People in the city's social scene all heard the warnings, Master Juan's new wife has a bad temper and lacks proper etiquette, so please be understanding. Until one day, when Master Juan receives an investigative report about some big-shot, and it reveals one of the secret identities of that supposedly ignorant country girl… as he sinks into silent contemplation.

(Source: Kuaikan, translated)