Sage Narada praised Anusuya very much making the wives of Brahma-Vishnu-Shiva jealous of Anusuya.parvati,lakshmi&saraswati requested their husbands to go and break her "pativrata" vrata (being loyal to husband all the time). Trimurties went to Anusuya as guests when sage Atri was not there at home and asked her to serve them food (lunch) without wearing clothes. She agreed and remembering her husband put the water on their converting them to 3 babies. Here the 3 goddesses parvati,lakshmi&saraswati were waiting for their husbands to come back and eventually arrived at the scene to find that their husbands have been converted to babies. They repented and by the request of Anusuya the three Gods decided to be born as her 3 sons.Once trinity decided to test the chastity of Anasuya. They came to Anasuyaa's house as Brahmins and request for food with the condition that she has to serve it nude. Anasuyaa with much hesitation agreed to that. In turn she used her pativrita shakti to convert the Brahmins into child and offered them food without any dress. Trinity could revert back to their original form only after she did herself on the request of gods. Trinity blessed them with three sons being sons: Dattatreya, Chandraatri and Durvasa.So,Anusuya had 3 sons namely, Soma or Chandra (the Moon) from Brahma, Dattatreya from Vishnu and sage Durvasa from Shiva.This incident happened during the Ramayana period,where at the time parvati is married to shiva,but in DKDM,sage Durvasa was showed.How come it possible?????Durvasa was not born at the time of shiva-parvati marriage.