It will not come as a surprise that Waiting is an essential part of our play.
Waiting in a Nadu-way is very arousing. And waiting just for the door to open is an experience worth waiting for. Imagine you open the door. The door can be fully opened without hurting her. And she, with her knees soooo wide on the floor. It will hurt, I think to wait until her master comes along.
But think of the reward he will give her to find her this way! Loving submission with an exclamation mark!