It is related in the Fourth Part of the Treasure of the Rosary, miracle eighty-fifth, that a gentleman who was most devoted to the divine mother, had set apart in his palace an oratory where, before a beautiful statue of Mary, he was
accustomed often to remain praying, not only by day, but also by night, interrupting his rest to go and honor his beloved Lady; but his wife, for he was married, though she was a very devout person, observing that her husband in the deepest silence of the night left his bed, and going from his apartment did not return for a long time, became jealous, and was suspicious of evil.
Wherefore, one day, to free herself from this thorn which tormented her, she ventured to ask him if he ever loved any other woman but herself. Smiling, he answered her:
“I assure you that I love the most amiable lady in the world; to her I have given my whole heart and rather would I die than cease to love her; if you knew her, you would say that I ought to love her more than I do”
He meant the most Holy Virgin whom he loved so tenderly. But his wife, conceiving a greater suspicion than before, in order to ascertain the truth better, interrogated him anew and asked him if he arose from his bed and left the room every night to meet that lady. The gentleman, who did not perceive the great trouble of his wife, answered “Yes.” The wife was completely deceived, and, blinded by passion, one night when her husband according to his custom, had left the chamber, seized a knife in despair, cut her throat, and very soon died. Her husband having finished his devotion, returned to his apartment, but. on going to bed, found it wet. He called his wife; she did not answer: he tried to arouse her; she was immovable.
At length, he took a light, found the bed full of blood, and his wife dead, with her throat cut. Then he perceived that she had destroyed herself through jealousy. What does he do? He locks the door of his apartment, returns to the chapel, prostrates himself before the most blessed Virgin, and shedding a torrent of tears, said to her:
“Oh my mother, behold my affliction: if thou dost not console me, to whom shall I go? Remember I am so unfortunate as to see my wife dead and lost because I have come hither to pay thee honour, oh my mother, who dost help us in all our troubles, help me now.”
How surely does every one obtain what he wishes if he supplicates with confidence this mother of mercy! No sooner did he offer this prayer than he heard a servant-maid calling him:
“My lord, come to your apartment, for your lady calls you”
The gentleman could hardly believe these words for joy. Return, he said to the servant, and see if she really calls me. She returned, entreating him to go quickly, for her mistress was waiting for him. He went, opened the door, and found his wife living; she threw herself at his feet in tears and begged him to pardon her, saying:
“Oh, my husband, the mother of God, through thy prayer, has delivered me from hell”.
Weeping for joy, they went to their oratory to thank the Blessed Virgin. The next day the husband made a feast for all their relations, to whom the wife herself related the facts, at the same time showing the marks of the wound, and all were more deeply inflamed with the love of the divine mother.
Source: “The Glories of Mary” by St Alphonsus Liguori