MTL - Extreme Knight - Chapter 212 borrow a knife to kill

In the Year 350 of the Anping Dynasty, humans were faced with a huge crisis. Earth was invaded by monsters from another dimension. Fortunately, Su Yu awoke a power where he possessed a scripture that allowed him to contain everything in existence. With that power, he was able to face the coming apocalypse.

“Sanye, do you know that you are like a book. Every time I see you I want to … sleep.”

After some hesitation, Xin Ai finally decided to approach Jian Sanye, who was famous for his power. She tried hard to make him happy, justify thousands of ways, sacrifice self-esteem and dignity, with the main goal to find her missing sister.

Three months later, the man threw a check in front of her, “I’m tired.”

Xin Ai stood up with her innocent body without a single strand, smiled wryly and said, “Alright, I’ll go as far away from you as possible.”

When they met again, Xin Ai closed her eyes to Jian Sanye’s presence, it made the man angrily push her against the wall, “We’ve slept together a few times. Is it so easy to forget me?”

Xin Ai smiled so sweetly and teasingly, putting her hand on the shoulder of the man, “Sorry, I have slept with quite a few men, sometimes I can’t remember it even happening. If I may know, what’s your name, sir?”

“Just watch, I’ll make you remember who I am.”

- Description from Novelupdates

Shen Yinning was originally the Crown Prince Lu Ying's childhood sweetheart and fiancée, but due to her father and brother's rebellion, she was exiled to Gan State and married to a minor local official as the daughter of a criminal. Meanwhile, Lu Ying gloriously married her cousin Shen Yunxi as his Crown Princess Consort.Three years later, Shen Yinning returned to the Capital with her husband. Everyone praised the Crown Prince and Princess for their mutual respect and harmony, and Shen Yunxi often flaunted in front of her how loving she and the Crown Prince were. However, only Shen Yinning knew that the seemingly restrained and honorable Lu Ying came to her chamber every night, completely disregarding the fact that she was now someone else's wife, secretly claiming her and keeping her as his Forbidden Fruit...

The poor Commandery Princess is down and out. Her father died when she was young, and her mother passed away not long ago. Her grandfather, the only one she can rely on, is now at death’s door from his illness. Faced with the merciless uncle, the greedy aunts, as well as cousins competing to present the model of the worst relatives, the Commandery Princess could do nothing but feel depressed in heart.