After becoming pregnant, the cold-hearted nobles all went mad.

[Refined self-interest + villainous female protagonist with a satisfying story + pregnancy + social climbing + completely virginal] [Female protagonist vs. multiple male protagonists vying for supremacy]
When Shen Lingyi finally woke up, she realized that she was living in a world of storybooks.
She was born into a noble family and possessed both talent and beauty, but unfortunately, she was just a wicked and vain supporting character who abandoned her childhood sweetheart to climb the social ladder, harmed her own sister, seduced her brother-in-law, and was full of evil.
In the end, she was tortured beyond recognition by the female lead's suitors and thrown into a snake pit, leaving not even a bone behind.
A voice in her mind reminded her: clear her name, give up her greed, and become the heroine's lackey to save her life.
Shen Lingyi laughed: Whitewash? Whitewash what?
The wicked woman sees through the plot; what's the difference between this and a mouse getting into a rice jar?
She insisted on being liked by everyone, on those in power bowing to her, on being revered by thousands, and on receiving glory.
The crown prince likes his older sister? Take her away.
Does the prince, her childhood sweetheart, truly hate her? She should just pretend to be wronged.
The prime minister avoids her like the plague? Even a good man is afraid of a woman's persistence!
She flirted with all three men, then turned her attention to the emperor on the high platform. Shen Lingyi forcefully took him in, her seductive waist and alluring charm captivating the emperor.
In the dead of night, the childless emperor whispered in her ear, "Lingyi, I'll give you power and status, will you bear me a child?"