That first statement makes Adelaide's pulse jump up again, because he happens to fix on the one major point on which she was not truthful. The circumstances under which Adelaide actually and accidentally found her brother while seeking out legitimate birth control, open up another entire can of worms that she is not willing to open right now with TR. The circumstances of Charlie's conception are not something she can find it in her heart to forgive or forget. And so she lied, for simplicity's sake, so as not to go near that topic.
But it doesn't seem that he is calling her out on that lie, so much as recriminating himself for the security breach itself.
An idea is starting to dawn on Adelaide that is both heady and humbling at once. She's always assumed that his worship was a conditional thing, predicated upon her being the right things, taking the right steps, maintaining the right face - but is it possible that she was, in essence, infallible all along? That she was in his head deep enough that he would paint her in flattering colors, regardless, as long as she didn't stray too completely into something loathsome? If so it would mean that none of her maneuvering has necessarily been as skillful as she had started giving herself credit for... but it would also mean that she can tell him just what it is she wants.
She watches him process it all, imagines his clever, tidy mind parsing down her statements into facts and filing them, alphabetical by keyword, and then cross-referenced with existing data. This is why it is so hard to keep ahead of him, she knows. He is obsessive and particular and frighteningly smart.
Which is also why, perhaps, that burgeoning idea is starting to take root. Maybe she doesn't have to outsmart him at all. His loyalty, this hypothetically genuine worship, has a new path forming in her head, new possibilities, but she wants to give the tires a few kicks before she buys in. Though it is seeming less and less likely, for all she knows the Mayor's patrolmen are waiting outside the door to take her as soon as he's finished pumping her for information. She wants to be more certain.
"It doesn't make you my enemy," Adelaide shakes her head. Her inventory of him is intuitive rather than meticulous, but maybe with this new Rosetta Stone she is testing out, it is enough. "It made you unknown, darling, and with circumstances like these, in this place, and with Olinger's obsession? I have to be certain. For me, and for Charlie." She reaches out again with that free left hand, rests it over his and squeezes. "I like to think that I can trust you. And that talk we had went a long way. I'm just trying to be certain. I'll protect him with everything I have."