The first daughter-in-law of a famous family

Description

He said: We can be separated.
She said: No, I want to be your father's daughter-in-law!
When everything was settled, she finally saved her family from the turmoil of changing dynasties.
Princess Qin: Your Highness, can we get together now?
King Qin: Don’t even think about it~!
PS: The fictional background of the Tang Dynasty~
[The eldest lady of the declining noble family who is capable of both literary and martial arts VS the domineering King of Qin whose father made me love my wife]