Above Madam Wan's head were words that only Ning Huan could see, clearly written as "Rock Sand Grass" and "Asarum Flower".

Ning Huan frowned. The combination of rock sand grass and asarum flower could indeed cause infertility if the body came into contact with them for a long time. However, she had never heard of Madam Wan using these two herbs. Could it be that she had overlooked something?

Seeing that Ning Huan hadn't spoken for a long time, Madam Wan seemed to have expected this, and smiled faintly: "Madam Ning Huan, actually, many doctors have said that there is nothing wrong with my body, I'm just a little weak."

Master Wan sighed and comforted Madam Wan, saying, "It's alright, Madam. It's best that you're healthy."

Ning Huan looked at Madam Wan and asked, "Did all the doctors who came to see me before say the same thing?"

Madam Wan nodded: "That's right. Some doctors will make up some symptoms and then make me spend a lot of money to buy their medicine. But there are also many doctors who tell the truth and say that although my body is a bit weak, I have no problems with fertility."

Just as Ning Huan was about to tell Madam Wan and Master Wan about the rock sand grass, there was a knock on the door. The maid named Xiao Shuang called out, "Madam, the Second Madam and the Fourth Madam are arguing again outside. It seems they heard that Master has invited a doctor to check on your health and they want to come and see."

Madam Wan frowned: "The female physician is a distinguished guest of the Wan family. She is examining my body right now. What kind of behavior is it for the Second Madam and the Fourth Madam to be arguing like this? Tell them to go back first."

No sooner had the words left his mouth than a woman's voice came from the doorway: "Master is really biased. Even if Madam's health is not good, she has seen many doctors over the years. After treating her, shouldn't you also take a look at our sisters' health?"

As they were speaking, a woman with a captivating figure, adorned in gold and silver, walked in, followed by a woman dressed in simple attire. Both women appeared to be slightly younger than Madam Wan. Upon seeing Madam Wan and Master Wan sitting together, the elegantly dressed woman rolled her eyes.

“Master and Madam have been married for so many years, and they are still together all the time. When will Madam be more generous and let Master spend more time with us sisters?”

Just as she finished speaking, the elegantly dressed woman behind her tugged at her sleeve: "Second Madam, there are outsiders here. You can't speak to Madam like that."

Madam Wan still wore that faint smile, but her voice had become much more serious: "Second Madam, you are, after all, an elder of this household. How can you speak such insolent and unruly words in front of our distinguished guests!"

Then Madam Wan looked at the woman behind the Second Madam, her expression softening considerably: "The Fourth Madam is a few years younger than you, yet she knows better than you how to behave."

The second wife glanced at her disdainfully: "I heard that before the fourth wife entered the manor, she was just a herb-gathering girl that the master happened to meet outside. She was about to freeze to death on the street before being taken in."

"Is her submissive and obsequious manner the reason why the lady admires her?"

Hearing the Second Madam's words, Ning Huan felt that any normal person would be unable to hold back their anger, but she didn't expect the Fourth Madam to be so calm and composed: "It is Xiaoyun's honor that Madam thinks highly of me. The Second Madam's words sound like she is jealous of my good relationship with the First Madam?"

Unable to win an argument with the fourth wife, the second wife stamped her foot in frustration and whined to Master Wan, "Master, look at what she's saying! How could I be jealous of a woman like her!"

Master Wan angrily roared at the Second Madam, "Didn't you see there's a female physician here? She's a distinguished guest of our household. How dare you run into the First Madam's room and act so presumptuously!"

"You've completely disgraced the Wan family! Go back to your room right now!"

Seeing that Master Wan was truly angry, the Second Madam dared not say anything more and hurriedly left. The Fourth Madam also asked the First Madam a few questions about her health before leaving.

Master Wan, looking embarrassed, explained to Ning Huan, "Madam Physician, everyone in our Wan household is usually very well-mannered. I don't know what's wrong with them today. Please don't take offense, Madam Ning."

Ning Huan was in no mood to deal with these people now; instead, she was preoccupied with figuring out where the poison in Madam Wan's body came from.

She thought about it carefully. Asarum flowers were rarely used for medicinal purposes; they were usually crushed into powder by women and used as spices. But she hadn't seen any asarum flower scent anywhere in Madam Wan's room.

When asked about the spices Madam Wan often used, Ning Huan found that asarum flowers were not among them, which made her even more puzzled.

Just then, Ning Huan suddenly felt that when the two ladies came over together, she seemed to smell the fragrance of asarum flowers. It wasn't very strong, so she didn't notice it.

It was precisely because I was so focused that I recalled the scent of asarum that I suddenly remembered there was a subtle spice aroma just now.

Ning Huan suddenly realized that Madam Wan's weakness might not be as simple as she had imagined. She asked, "Madam Wan, those two ladies just now, it seems that the second lady doesn't have a very good relationship with you?"

Madam Wan paused for a moment, then exchanged a glance with Master Wan and said, "Second Madam has always been like this. She doesn't mean much harm. If she has offended the female physician, I apologize to you on her behalf."

But Ning Huan said to Madam Wan in a serious tone, "Madam, I need to know the identities of the concubines and mistresses in this mansion, their relationships with you, and how you usually interact with them."

Madam Wan was initially confused, but seeing Ning Huan's very serious expression, she revealed the identities of everyone in the mansion one by one.

The two concubines who just arrived are the second wife and the fourth wife of the household. The second wife is shrewish and only Master Wan can control her in the household. If you displease her, even Madam Wan will get a few words from her, just like what happened just now.

My third aunt passed away years ago due to poor health, before the following spring.

The fourth wife usually enjoyed tending to flowers and plants. Because of her quiet and unassuming nature, she became friends with Madam Wan.

Master Wan continued somewhat embarrassedly, "The three women that the female physician met in the manor just now were my newly acquired concubine, the Fifth Madam, and the Seventh Concubine."

Although Master Wan had many concubines, he didn't have much contact with Madam Wan.