Explanation

"Mu Yao, you're too polite." She Yujin replied with a smile. She had already said on the phone that they were family, so there was no need to be so polite. You're here and you're saying this again. Alright, go do your own thing. Leave Little Yu and Yang Yang to us.

Oh right, wait a moment. Ask your brother-in-law to bring the medicine for your boyfriend. There's some for him and his brother and sister-in-law."

Why did she know the Hunts 'eldest brother and sister-in-law's Chinese medicine?

Before Mu Yao could ask, She Tian Qi explained,"One of my senior brothers checked Mrs. Hunt's pulse in Jincheng. He also checked the Huo family's eldest son and his wife. He prescribed some Chinese medicine. Since Jin City doesn't have any fresh ones, he called me. Since you're going to Jin City, you can bring them over."

The medicine that She Yujin took out was not a concocted medicine, but a portion of it.