Great Expectations Questions

On page 214 it says "'Molly,' said Mr. Jaggers, not looking at her, but obstinately looking at the opposite side of the room, 'let them see both your wrists. Show them. Come!'" Molly is Mr. Jagger's maid and he seems to be very controlling over her. It then goes on to say, "The last wrist was much disfigured-deeply scared and scared across and across." Molly seems very innocent and it is unusual that this was brought up. Her wrists didn't seem to have much to do with what was happening in the story.

I think this will show up again in this book. Everything in the book seems to come back again somewhere else in the book. It seems as though maybe this has a deeper meaning in the book that we haven't discovered yet. We were never told the reason that she had these scars so maybe later on in the book we will be told why. I want to know how she got these scars, do you have any ideas of how she got them?