If she wasn't joking about him being a part of a racial hate group (maybe he is, I have no idea), don't you think she might harbor some resentment for him? If that wasn't a joke she could be angry about that as motivation. False accusations happen more often than you might imagine. It's gotten to the point of around one thousands cases annually, and support groups are being established because it's gotten that bad. Unfortunately we often treat male on female sexual assault allegations as a 'guilty until proven innocent' matter, and some women abuse this. It's a way to ruin someone's life forever, despite whether or not the allegations prove to be true, and the punishment for such false accusations routinely ranges from no consequence to minor jailtime. Like I said, it is NOT out of the realm of possibility. Power corrupts women just as much as men.