Yeah, its a gut punch... been there. That being said I will commend you ... as much as you were out of control with things early on you do sound very grounded at this point. The truth seems to have set you free at this point.
Do be mindful here, she has had this going for some time and now that her 'fantasy' is starting to quickly crumble there will be movement ... the A is no longer as much a secret as it was, and that part of it fuels the A considerably. She also has to now move, figure out her 'new' financial situation ... along with having the 'bad' car. This is most likely not going how she had it all mapped out.
I think you are going through this well on your side .. protecting yourself finally .... taking the lead here. That said .. I do think its all fresh.. I do recommend you continue IC .. regardless of your M, there are some hurts there .. you might have shoved them aside .. but please continue to do the work, I think its AJ that said there are 2 ways out of this .. become better or bitter ... I hope you take the first door here.