Damn, sounds like a year from hell.
+1 to what JP10 said about mindset. She has to be on board, and usually there is a reason for lack of motivation. Depression, unhappiness, lack of self worth, etc, can be the root cause of why she won't work on herself. A coach can help motivate, but she has to be willing to listen and put in the work. A good friend is a fitness coach, and he always says the biggest hurdle is getting people over the wall that is preventing them from being consistent. Anyone can work out once, but there has to be a reason for them to come back.
Hopefully this was a wake-up call for her, and having you as an advocate will help.