Bei Chuan Yun Shang Jin

"Missus, time to fulfil your duties!” Mu Yuchen demanded as he pulled Xi Xiaye closer with his arms intimately wrapped around her waist.
—
It was a meticulously planned feast for the powerful. Her fiancé had knelt down on one knee and proposed to her sister instead. Robbed of her right to her inheritance, she was prepared for the Xi family to throw her to the wolves.
As she slipped away from her family that had turned their backs on her, she found him — Mu Yuchen, the low-profile and reserved noble that ruled City Z and led Glory World Corporation.
“Mu Yuchen, let’s get married!” He looked up at her, then suddenly stood up. 
“Where are you going?”
"Let’s go. Any later and the civil affairs bureau will be closed.”

EndlessFantasy Translation 

The Most Loving Marriage In History: Master Mu’s Pampered Wife

She remembered that Zhuang Shurong and Mu Tangchuan only had one son, and now…

"Lingshi is my aunt's daughter. She's my cousin," he replied quietly.

She had never heard about Mu Yinan having a daughter. Did they not just have one son, Mu Tangchuan? Did they have a daughter?

"She's not with us anymore. Don't mention it. My parents took Lingshi in like their real daughter, so Lingshi calls them Father and Mother too since they don't want her to feel different from any other children."

He did not seem very willing to explain any further and stopped talking. Xi Xiaye realized his expression was calm, yet the silence in his eyes was somewhat different than usual.

After giving it some thought, she did not ask anything else. She just pulled the corner of his shirt…

Going Along!