my two cents,...occum's razor. Don/Con's lieing doesn't bother her because,....she is a liar also.
so she not offended because if she was,...she'd be offended by her own self.
and narcissists can't afford to not admire themselves.
occum's razor is the problem-solving principle that the simplest solution tends to be the right one.
invest at your own risk, based on your own due diligence, at your own risk tolerance