This is just another version of the team and leadership questions. Rather than answer directly what you would do, give an example of your own when you were faced with such a situation and describe how you dealt with it and how it might apply to the current situation.

A good idea for this variation of the question is to note that it really does depend on the situation and that the most important things to keep in mind as you weigh your options are respect for all individuals involved, and honoring the needs and priorities of the client.