Well, assuming that it was only hot because it was just taken off the stove, then the mom yells for a minute, it could feasibly have cooled off enough in that minute

Also keep in mind that people who cook a lot tend to develop what I call teflon hands; the nerves are less sensitive, the skin is a little tougher, and you can handle higher temperatures. Mom's probably been cooking (and washing dishes in very hot water) for many years. Doesn't mean that she has to denigrate her son for being less inured to the heat, though. There's never a good reason to tear down somebody that you love.

its beyond a badass

Didn't even realize till you pointed it out