You just admitted the "girl" was an AI video persona, which is possible to identify with a trained eye. Thus, there was video evidence that the "girl" was being deceptive and all traits they claimed about themselves were suspect. To quote Ready Player One, "she could be a 300-pound dude named Chuck."

The defendant could claim actual 14 year olds would be unable to orchestrate such a setup with AI personas. Thus, it must have been an older person doing it.