Hi
My lock has 3 keys, one she has with her car and work keys.
If she is away that one is out of reach, and if i where to touch it while she is asleep there is big trouble.
The other two are laminated, one in her purse and one in my wallet for extreme emergencies.
But trust me i would not dare open mine unless i am unexpectedly about to go into surgery.
This way there is always a backup, but bottom line she has the main key.