Theodore Nott. This was seemingly becoming a game where his wife named a number of people he didn't know because they weren't important enough for him to take notice or didn't bother to learn the name. Although there was a pattern here, her telling things to other people. One that it wouldn't surprise him to learn he was somehow the cause of.
"Then perhaps we should talk to him about it." Their son had always been smart, taking after him in that regard. Lying or pretending that everything was fine would likely only make the child worry more. "I mean if I were his age and my parents were going through something like this or not, I would have been aware of it and would want to know if there was something I could do."