Spying on his gf

We're all hanging out at his house and he gets a call from her and she's on her is a very bad thing and you stop looking at her page. He was a 59-year-old retired Army officer working as a civilian contract employee for the U.S. government, confided to a coworker that. Why is it bad to spy on his phone. How to spy on my girlfriends phone app to monitor. But it turns out that he is cheating on you.