Mary And The Fallen Nun

Our advocate has shown how great is her kindness towards sinners by her mercy to Beatrice, a nun in the monastery of Fontebraldo, as related by Cesarius, and by Father Rho.
This unhappy religious, having contracted a passion for a certain youth, agreed to flee with him from the convent; and, in fact, she went one day before a statue of the blessed Virgin, and there deposited the keys of the monastery, for she was portress, and boldly departed.
Arrived in another country, she led the miserable life of a prostitute for fifteen years. It happened that she met, one day, the agent of the monastery in the city where she was living, and asked of him, thinking he would not recognize her again, if he knew sister Beatrice?
“I knew her well,” he said. “She is a holy nun, and at present is mistress of novices.”
At this intelligence she was confounded and amazed, not knowing how to understand it. In order to ascertain the truth, she put on another dress and went to the monastery.
She asked for sister Beatrice, and behold, the most holy Virgin appeared before her in the form of that same image to which at parting she had committed her keys, and her dress.
The divine mother thus spoke to her: “Beatrice, be it known to thee that, in order to prevent thy disgrace, I assumed thy form, and have filled thy office for the fifteen years that thou hast lived far from the monastery and from God. My child, return, and do penance, for my Son is still waiting for thee; and strive by thy holy life to preserve the good name I have gained thee.” She spoke thus and disappeared.
Beatrice re-entered the monastery, resumed the habit of a religious, and, grateful for the mercy of Mary, led the life of a saint. At her death she made known the foregoing incident, to the glory of this great queen. (From the Glories of Mary, translated from the Italian of St. Alphonsus Liguori)