As I was going through the short story again, an interesting thought came to me. Who has the lamb? Mary Maloney. And then the nursery rhyme 'Mary had a little lamb' started playing in my mind. Do they have any similarities?
Well, both Mary have a 'lamb'. One is frozen, the other still alive and kicking. Imagine having the nursery rhyme changed to "Mary had a leg of lamb"? Perhaps it will go something like this:
Mary had a leg of lamb,
leg of lamb, leg of lamb,
Mary had a leg of lamb
to bash her hubby's skull.