Bb never showed the actual clip did they?
I imagine it was said in a much more silly way that is coming across... Probably when she had hot water and they didn't, inflamed by a tiff or her milking it he flippantly says, "well i hope it burns you" - meaning burn as in the water is a bit too hot not as in all her skin falls off... Perhaps said with the equivalent venom as when someone says "don't let the door hit you on the way out".