It isn’t a very difficult “Where’s Waldo” photo, but she wasn’t trying to be subtle. She was trying to get to me to make me stop singing. I was standing at a music stand facing the piano, working on warm ups, and she gets quite perturbed when I even sound like I’m working on overtone singing. I can actually tell when I am using my full resonant voice because she comes over to yell at me (it is definitely not with me). Actual overtone singing and she will come from anywhere in the house to get me to stop.