It might help to consider that to call a statement a "lie" involves a moral judgment. Ts aren't in the moral judging game. Lies are symptoms. Ts are most interested in getting beneath the symptom to the cause. And astute Ts are pretty attuned to "lies," so she may already sense that there's something going on and she's just waiting for you to be ready to address it. And that would be seen as progress. Try to lighten up on yourself a bit.