Inheriting My Late Sister's Fiancée

Wen Zhihan had always thought Tang Ning was a docile little white rabbit.

That is, until her fiancee, Tang Yu, died by the sea.

At the funeral, Tang Ning, her usually quiet younger sister-in-law, took her hand, her eyes slightly red. "Sister-in-law, now that my sister is gone, could I... take her place and look after you?"

Both families readily agreed, and the engagement passed to Tang Ning as a matter of course.

Wen Zhihan thought the girl had lost her sister and was all alone. She ought to treat her well.

After they married, Tang Ning appeared at Wen Zhihan's bedroom door every night, right on time.

"Sister Wen, I had a nightmare."

"Sister Wen, can I sleep with you?"

"Sister Wen..." Her fingers curled around Wen Zhihan's waist. "My sister could hug you. I can too, right?"

Wen Zhihan's heart softened, and she indulged her, thinking it was only a young girl's dependence.

Until one day, she found Tang Yu's phone in Tang Ning's drawer.

On the screen was a message Tang Yu had never managed to send: "Xiaoning, what exactly are you trying to do with Zhihan?"

The door opened from the outside, and Tang Ning wrapped her arms around Wen Zhihan from behind, her voice soft and sweet.

"Sister-in-law, you found it?"

"Well... I guess I don't have to pretend anymore."

Later, Tang Ning pinned her against the bed and bit her earlobe.

"Sister-in-law, do you know? When I had a high fever at sixteen, you were the only one who came to see me."

"You fed me medicine, wiped my sweat, and soothed me, saying, 'Ningning, be good. Don't cry.'"

She smiled, revealing two little tiger teeth.

"But, Sister-in-law, I was crying. How did you not notice...?"

"I was crying because you belonged to my sister."

[Bonus Scene]

Later, Wen Zhihan asked Tang Ning, "When did you stop pretending?"

Tang Ning was nestled in the crook of her neck, reluctant to get out of bed. At the question, she lifted her dewy eyes, as obedient as a satisfied cat. "I'm still pretending now."

Wen Zhihan: "...?"

"Pretending to be good, pretending to be pitiful, pretending I can't live without you." Tang Ning rolled over and pressed her down, undoing the buttons of her pajamas with deliberate ease. "Otherwise, how would you feel sorry for me, keep me here, and..."

She lowered her head and kissed the place where Wen Zhihan's heart beat.

"Love me forever."

Reading Tips:

1. Sweet and obedient on the surface, obsessive and yandere underneath, younger woman x poised, restrained beauty with a strong moral compass

2. 1v1, happy ending, in a setting where same-sex marriage is legal

3. Big-sister-and-puppy dynamic, except the puppy is faking it; a marriage of convenience that turns to love, except the love was won through deception

Theme: The heart is precious when it is bright and pure