Why not buy one.
If it will put her at ease which will put you at ease -- good idea -- right.
I remember when I sobered up my wife had her eye on me for a while.
Honestly, I couldn't blame her.
But, in a marriage we should not waste too much time before putting it all behind us.
Note -- if we flip the circuit breaker too many times there may be no reset.
Mountainmanbob