Yes, it would be fair that she pays back that kind of stuff, but let's put it back into the bigger picture. Would it help your sitch? If so, can you afford that she doesn't pay bac? Do you do it as a matter of principle or because you truly need the money? Any way in which it could help you to ask for a pay back, like making her face the reality of her choices or showing some fairness and self-respect? Have you checked if there's anything about this in DR? I can't recall on top of my head.
I guess you could put it in writing in some separation agreement for instance and see how she reacts? You could be the one that's surprised that she wouldn't want to pay back, as if it were the most natural thing in the world, which it is.
By the way, there are always financial losses and inequity in separations, as far as I can tell. I know that my W left a lot behind, almost everything that we paid together. Her parents paid for her move and new furniture and appliances, so it didn't matter to her. She just wanted out ASAP and to protect the cordiality, for the sake of the kids. Think of the state of mind of your WAW and remember that we have a natural tendencies to see unfairness as victims more than as perpetrators.
M39 D6 D3 (at S) S 2014-09 D 2016-09
"You can't start a fire sitting around, crying over a broken heart" - Bruce Springsteen.
