Midrash su Rut 3:16

“She came to her mother-in-law, and she said: Who are you, my daughter? She told her everything that the man had done for her” (Ruth 3:16).
“She came to her mother-in-law, and she said: Who are you, my daughter?” Did she not know her? Rather, she said to her: ‘What are you, single, or a married woman?’ She said to her: ‘Single.’ “She told her everything that the man had done for her.”