Qi Lan did not question this statement, because in her mind, the person standing in front of her was her true master, so she truthfully said, "Yu Yan is your half-sister."

Upon hearing this, Wan'er stared at Qi Lan in disbelief, "She's my sister?"

Recalling her appearance in the bronze mirror, Yu Yan did indeed resemble herself in some ways.

"Yes," Qi Lan replied, bowing her head.

Wan'er wanted to ask Qi Lan how he knew, but then she suddenly remembered that Yu Yan had said during the day that Qi Lan had served her since he was a child, which meant that Qi Lan came from the Dong E Mansion. Since he came from the Dong E Mansion, he would know some things.

"So, she's a young lady from a wealthy family, how could she be a servant in the palace?" Wan'er asked, frowning.

Qi Lan respectfully reported, "Her mother was a foot-washing maidservant by the side of the Fujin. In order to turn herself into a mistress, she actually put dirty medicine in the master's food, which is how she got pregnant. However, her mother's wishful thinking failed. Even though she was pregnant, the master would not make her a concubine. So now her mother is a servant, and she is a servant too."

"Like mother, like daughter; the person who did this is definitely not a good person."

Wan'er murmured softly, but Qi Lan still heard her words.

"I have something to say, but I don't know if I should say it." Qi Lan hesitated for a long time before finally speaking.

She didn't want to speak at first, but when she saw that Wan'er was no longer so protective of Yu Yan, she dared to speak up.

"Go ahead and say it," Wan'er gestured.

Qi Lan pursed her lips. "Master, you are too kind-hearted. You always feel indebted to Yu Yan and treat her like a younger sister. But she only takes advantage of you and even..."

Upon hearing this, Wan'er had already guessed that Qi Lan knew about the slow-acting poison, which explained why she had promptly knocked it over.