Goddess lakshmi is the wife of Lord Vishnu. Vishnu belongs to the trinity of Brahma-Vishnu-Mahesh or Shiv. Brahma creates everything in this universe, Vishnu preserves or sustains it, and Shiv ultimately destroys it. This is the cycle of nature and the rule or law of this universe. Goddess Lakshmi helps and is needed in every aspect Of Lord Vishnu's duty to preserve this world. She remains steadfast at her husband's side and never leaves him. Lord Kamdev is Goddess Lakshmi and Lord Vishnu's son. Lakshmi - wealth : Lakshmi is the Goddess of wealth and prosperity. Without a little wealth one cannot imagine how life could be sustained at all. Even a minimum requirement of food, clothing, or shelter requires some income. Vishnu - Dharma : Lord Vishnu is the "palanhar" or preserver-protector of this world. His duty is to balance good over evil in this world. By following this righteous path he sustains this universe.