In the end, the cooperation between Devas and Asuras was shattered with Vishnu taking the form of Mohini - a beautiful and enchanting damsel who served to distract the Asuras while distributing the nectar to the Devas. (a little cheating and disception seems to be happening here). The Devas having fulfilled their plan of acquring all the Amrita banished the Asuras out of Heaven and into the underworld. (tsk tsk)