Tom, like Joseph on the other thread I have to wonder what your purpose is in here. I couldn't find anything on Sweat under either name, or on the Michilimakinac Metis either. It could be an unrecognized group, or people with distant ancestry. If it's the second, a lot of these groups often put on airs to seem more legit than they are.
She might not be truthful about who she is or who her ancestors are. (Based on that list, she certainly isn't. I know Goyathlay's family has no relation to any of the other famous NDNs on the list.) But that wouldn't make her a Nuage fraud, unless she's doing phony ceremonies and things like that.
Could you tell us more about yourself and why you're upset with her, other than this vague information?