Even though these two atoms are interacting with each other, their dipoles may still fluctuate. However, they must fluctuate in synchrony in order to maintain their dipoles and stay interacted with each other. Result of synchronizing fluctuation of dipoles:
#Unit 1. Molecules and their Interaction Relevant to Biology#Stablizing interactions (Van der Waals, electrostatic, hydrogen bonding, hydrophobic interaction)#Part B Pointers