Noble ladies seeking medical treatment must neither claim their illness to be too severe, nor can they forgo taking some tonic prescriptions, such standard official excuses are used to deal with these situations.
Otherwise, if the noble person misunderstands, life would indeed become quite unpleasant.
Of course, Zhang Xiaoying isn't afraid, but she also doesn't wish to stir up any trouble.
She needs to see what exactly the Crown Prince is up to by having his wife fake an illness.
"In that case, all is well," the Prince Consort nodded. "Since you have come to the capital, do you plan to open a medical clinic? If you have such plans, don't forget to inform me when the time comes."