Miss or Mrs.?

"Dearest Natalie -- As the brute insists, the brute must have the invitation which I inclose. Never mind, my child. You and Launce are coming to dinner, and I will see that you have your little private opportunities of retirement afterward. All I expect of you in return is, _not_ to look (when you come back) as if your husband had been kissing you. You will certainly let out the secret of those stolen kisses, if you don't take care. At mamma's dinner yesterday, your color (when you came out of the conservatory) was a sight to see. Even your shoulders were red! They are charming shoulders, I know, and men take the strangest fancies sometimes. But, my dear, suppose you wear a chemisette next time, if you haven't authority enough over him to prevent his doing it again!