It is quite fun if you have a woman who will tease you from time to time because that is a good way to bring the old spark into your relationship.
But if she does that all the time—and not only with you but with other men as well—then you should know that she is not wifey material.
She is playing her own game, and she wants to know how you will react when confronted with pressure. This girl is only good to have fun with, but she is not the right thing for the long-run.