It took less than a minute to install the keystroke logger. Less than a minute to gain access to every piece of data that passed through the phone.
He read all of the emails, texts and knew who called who and for how long.
It provided him with the sort of insight and education you couldn’t get from a person any other way because no one would agree to share their life with you in such an unguarded fashion.
Knowledge was power.
The only question was how and when to use it.