The wifi went out and suddenly everybody in the house had a face.

Outages reveal what was there all along. The people in your house did not appear when the connection dropped, they simply became visible, because everyone stopped being routed somewhere else. It is a slightly uncomfortable thing to notice, and it says nothing bad about anyone. Attention goes where it is pulled, and something else had been doing all the pulling.

Do the outage on purpose once: one evening, everything off at the same time, including the adults. Awkward for about ten minutes and then not. Whatever happens after that awkward stretch is the version of your house underneath the wifi.