[@PaulHaynek]

Essentially it's her pheromone dispenser. 
The way she can find and feel at home despite no actual queen being nearby. 
Given it is in your home, psychologically she assumes you to be the queen. (Or at least "desireable" in some way or form)

Ultimately though, it is ment to be a last resort as she would naturally seek out this place if everything went wrong. But its metallic doors can be sealed remotely.

Meaning the 'trial time' really isn't for Nick... xD

[@liferusher]

He has no idea... xD