*on realizing the magnitude of what he's found, he pauses, withdrawing from her mind to consider. This...influence makes things more complicated; he can't simply obliterate her, now, or shape her into a tool as he'd halfway intended. Not and keep true to his own words after the recent Game, and above all else, Jace hates indulging in hypocrisy.
But this incident cannot be allowed to stand, and after a long moment of thought, he has the answer. It will take delicate, exacting work, but it is within the bounds of his bracered capabilities, if barely. Sliding back into the sorceresses mind, he implants guilt and shame, a deep well of both, linking them to her memories of the past day -- and it takes him more than a moment to calm himself enough to continue, after he sees the other memories of her Limit Break. He builds subtle chains of thought, bringing the responsibility of her station to the fore: how, the new touch on her memories asks, can you have behaved so, who were chosen to guide and rule justly? He strengthens that responsibility in her mind, using her newborn shame as a goad.
And after he is finished, he alters her memory of the last few moments further, so that she does not remember being assaulted. Instead, she recalls only that two Blanks stood against her over the body of their friend, and that the realization of her acts crashed over her all at once.
withdrawing from her mind, he presses one hand briefly to his forehead, forcing back the pounding headache with sheer determination, and waits.*