It is on you to make sure you are eligible for what you are requesting - NVC has no way of knowing if you are legally residing in another country.
I understand you do not want to be separated, so go with your priorities. If getting the visa fast is your priority, have her relocate first. If you do not mind longer wait, then show what you have now, and accept possible delays/later separation if she needs to relocate. No magic trick.
Look up this thread for more ideas of steps possible to demonstrate her intent to reestablish domicile: