My DS who fed until 3 and a half keeps telling me now that he's going to "take me back to the Mummy shop and get a new one" - so no attachment issues there either!
Seriously, there's no point trying to change your Mum's mind - you didn't with Jesse, and you won't now. Just tell her that "although you "should be ashamed" you're not", and ask her to help with the things that she can do to make your time easier at the moment.