Idd. She may not agree with what he did. But parents are supposed to be united in their efforts. 

I'm not saying the guy is completely blameless. Slamming the computer and instantly grounding a kid for looking at something inappropriate on the internet seems a little excessive. At the very least, he should've talked about this with his wife first.

But the wife is the true asshole imo. I consider it very likely that she damaged the marriage by acting the way she did. If I were that husband, this would not happen a second time without me seriously considering divorce.