I heard my wife humming over the phone with my best friend...

When my wife first married, she hummed every day, but recently she's been getting bored and has been experiencing less sex and less humming as well. My wife is humming for the first time in years while washing dishes in the kitchen. Apparently, he's been in a good mood recently, and for me, my wife's humming was pleasant. One day, while I was on a phone call with my best friend, I heard my wife's humming through the phone. The humming, which is usually supposed to be comfortable, starts to sound like an infidelity...