And, O exceedingly pious one, on being overlooked by Lakshmi, the Daityas, ever disregarding Vishnu—headed by Viprachitti—were wrought up with extreme anxiety. And then, O twice-born one, the Daityas, endowed with great prowess, possessed themselves of the Kamandalu that was in the hand of Dhanwantari, and which contained the ambrosia. And then Vishnu, assuming a female form, and thereby exciting their desire, secured the same, and then the Lord made it over unto the celestials.

In plain words: Lakshmi did not look at the demons, who always ignored Vishnu, and they grew very worried. The demons grabbed Dhanvantari's pot of amrita. Then Vishnu took the form of a beautiful woman, charmed them, got the pot back and gave it to the gods.