So...
Mary has been unusually happy since the little time skip.
Almost as if what occurred prior o that time skip has CAUSED her new-found happiness and general 'bongoness' towards others.
Almost as if she may have gone through similar, if not worse, an incident as Joyce... at scarface's hands...
Almost as if... Willis is setting up all the, "Mary is a horrible, terrible, irredeemable person!!" people, with a huge, "Well, FU - This is how victims can react when living with it!"
Might not be the case... but *I* think it would be a very interesting twist!