IH, I know to you it seems like she's not being cooperative and you are, but honestly reading this whole exchange it sounds to me like you're both equally contributing to the discord. Not a lot of listening and validating happening on your end. You just like to pick at each other.
That said, she is very clearly having financial issues and man I would get out of there as quickly as you can! How is she going to come up with the 5k to pay you the way she's burning through money? She's already in debt up to her eyeballs it sounds like. I have a feeling that money you fronted her is long gone which is why she's trying to nick you for a few hundred more. I know you're working through a mediator but do you separately have an L? I would just make quadruple sure that you can't be held out to dry on all this debt she's racking up!