Translation of erhitzen

A bystander who watched the entire scene all the time decided to help me. He was an older man, around seventy, but nonetheless he went to the oldest of these kids and slapped him. The boy was sixteen.
She even compares the hills across the station with the belly of a pregnant woman by saying that they do look like white elephants. Maybe she thinks that way but I am not really sure about that.
My wife and her started a nice conversation and the village girl did not believe that my wife was older than thirty years old. My wife considered herself as old, but the little girl explained her that she wasn't.