Why Are You Obsessed With Your Fake Wife?

Read manhwa Why Are You Obsessed With Your Fake Wife? / 가짜 아내에게 왜 집착하세요?
“You’d better not dream of being acknowledged as my wife. I would never have a successor with the daughter of Balazit.”
Hearing that, Nadia almost said, “I feel the same way.”
Thank you, Marquis. I hope you keep your words.
***
“You said you had no intention of sharing the bed with me.”
“…”
“So for the sake of a successor, you have no choice but to bring in a concubine…”
Crack.
Nadia’s head turned at the sound of something cracking.
Then, a crack is seen in a corner of the table where her husband was.
I mean, why was that table breaking all of a sudden?