From the Start, I Was Given Poisoned Wine. I Seized the Tyrant's Body and Tore Through the Court

[Underdog comeback + soul swap + hiding one's strength + wish fulfillment + sharp-tongued bickering]

Chu Lan, the youngest daughter of a modern martial arts family, transmigrated and became an empress adored by everyone?

Well, an expendable empress, poisoned from the start. She meant to kill the tyrant, but a twist of fate caused them to switch bodies.

Chu Lan stared gloomily at the tyrant in her body. [Guards! Drag the empress away... and lock her up!]

Tyrant Mo Yunche: [...Woman, you'll be begging me to let you out.]

Chu Lan flipped him the bird. Then that night, she clutched her stomach and ran into the tyrant's chambers. [Babe, I'm sorry.]

Another minister advised, [Your Majesty, you should share your favor among the imperial consorts and ensure the continuation of the royal line. How can you dote on the empress alone?]

Chu Lan was deeply moved. [My dear minister, you truly are a loyal subject.]

So that night, Chu Lan gleefully summoned a sweet and charming new beauty.

The candlelight was alluring, gauzy curtains swayed gently. Rubbing her hands together, Chu Lan lifted the bed curtains, only to find a lovely beauty smiling sweetly at her.

He crooked a finger. [Come here.]

Chu Lan: [...]

Can someone tell her why this tyrant is here?