answer: Jim's shirt is broken because Betty forgets to turn off the iron.
documents: #Person1#: Betty, something is burning. Can you smell it?
  #Person2#: You're right.
  #Person1#: Look! The iron is still on.
  #Person2#: I should have turned it off. I'll turn it off now.
  #Person1#: Look at my nice blue shirt, there's a big hole in it.
  #Person2#: I'm sorry, Jim.
  #Person1#: Never mind, dear.