I feel like hindsight is 20/20 when it comes to grooming. Whether she was groomed at 11 or not, Sarah was still a kid. She could've recognized all the signs but was too star struck to care until things started to crumble. The problem arises that he had an underage fan inside his house, Taylor (and by extension, Greg himself) had custody of her, his wife exchanged nude photos with said girl and he has easy access to all of her accounts. Regardless of how far he tries to spin this web, he can't seem to really catch anything but him and Taylor.
I think his thing right now is that he cant even come up with a convincing lie to believe in, his arguments get btfo'd instantly.