Moonacre

Maria never ran into Loveday and left Moonacre. The resulting curse eliminated the entire de Noir bloodline and left Maria as the only one to carry on the Merryweather legacy.
Over 100 years later, Jane is the last Merryweather and therefore the last Moon Princess.
To restore the legacy of both the Merryweathers and the de Noirs she travels back in time to guide Maria on her path to lift the curse and save the valley.
After the events of the movie Jane decided to stay in Moonacre a while longer, knowing fully well that she should return to her own time once more but she can't bring herself to leave just yet.
Torn between her own reality and her new friends as well as her blossoming feelings for Robin, she must decide whether to go or to stay and leave her old life behind.

This takes place AFTER the movie.

special thanks and credit to jannieka394 for helping me put all of this together