Sorry to hear of your trouble with the ex. I know when me and my ex went through some stuff with her ex court was always held near her so he would have to come from Florida for court and this States laws would apply not Floridas. Just because we lived together the spousal support don't stop, only if she were to remarry would it sotop before the duration ordered by the court. This was true with my cousins divorce too. He got hit with over 800 per month for 5 years, no child support the kids were with him and no offset for support to him. That's bill too.
We never gave him a hard time although he could've helped a lot more than he did financially. $35.00 per week wasn't dog crap, barely paid what he ate per week never mind all the other costs.
There's no interstate common laws which makes it even tougher.
I would check her state and count laws to see how far they'll let her go, maybe a local to her lawyer could help you better then your current one.
Sorry for rambling.
Either way,
Good luck