This is the book:

Flame Ruyi

Author: Rongyan

Her charming appearance and coquettish voice that strengthened the impression harmed her. Always mistaken for a shady mistress! What an injustice! She is actually a good-natured woman, except that she has a bad temper and doesn't know how to be subtle in her speech. Fortunately, she meets a man who is willing to tolerate her, and his peaceful life is overturned by surprise again and again. The first time they met, she greeted him with high heels. The second time they met, she greeted him with high heels. She was a self-righteous hero who saved a beauty. The third time they met, she accidentally acted impulsively in front of him. The fourth time they met, she chose him and took the initiative to throw herself into his arms. Oh! Their personalities were completely different, and they didn't match at all. However, he believed that such a combination was a perfect match. In order to marry her, he even promised to curb his hidden illness and was willing to crawl under her skirt and become a wife slave. Unfortunately, she and his parents just couldn't bear the complicated family rules. She was going crazy. She couldn't bear it anymore and decided to move into a mistress community and become a real mistress!