She sent a familiar:

Shortly put in the female tube (as usual) sensory light,
This sensor works when a person enters the room.
When you enter the cabin, the sensor stops working.
You take off your pants, sit down and the light cuts off.

So here is

I made myself a cup of coffee, went to the toilet to wash a cup from the coffee machine.

The light is turned on, and from the door of the cabin the hand shakes.
As if the sensor worked... fucking how I was scared...