Could Voldemort ever fully possess Nagini or was their telepathic bond intensely strong so that Nagini would do anything that Voldemort said?
"But the man was stirring... a silver Cloak fell from his legs as he jumped to his feet; and Harry saw his vibrant, blurred outline towering above him, saw a wand withdrawn from a belt... he had no choice... he reared high from the floor and struck once, twice, three times, plunging his fangs deeply into the mans flesh, feeling his ribs splinter beneath his jaws, feeling the warm gush of blood... The man was yelling in pain... then he fell silent... he slumped backwards against the wall... blood was splattering on to the floor...."
In this scene Harry was supposedly seeing through Voldemort's mind. Yet how could Voldemort see through Nagini if Legilimency only shows memories, not current events? Is their telepathic connection so strong that he can see into her mind at will?