Her Bluff is very good but not actually good enough to convince him that multiple paladins lied to him about the Queen actually being an evil archmage and ex-lover of Iomedae. But, fine, if she wants to play games.
"I didn't publish the pamphlets alleging to be a redacted chapter of the Acts of Iomedae, Your Majesty, though I can testify that they are in fact what they claim to be, having been familiar with the Acts before the redactions were made. At any rate their revelation is far more embarrassing to the Church of Iomedae, who were apparently so unable to countenance their perfect Goddess having had personal relationships" a personal relationship, singular "that they compromised the integrity of their own holy book to hide it, than it would be to Iomedae's former lover, if hypothetically she were still around."
"... in other words, you should have seen the look on Cansellarion's face when I told him." If she's reading his mind she can see his recollection of it now.