If she knew words to dissuade this Keltham from this path, she would have thought them at the devil already! There are no brilliant strategems in her, that might outface this Keltham. Only horror and sickness in her that she cannot recall ever having felt, for never in her entire life has her future looked this dark.
Abrogail Thrune considers, as very few other people in Cheliax would even think to consider, telling Keltham that she's sorry; Abrogail has met more foreigners than the average Chelish citizen. But she does not foresee it ending well for her, it wasn't like she injured Keltham by accident and regretting the harm to him, as might lead one non-Asmodean to forgive another. She sincerely regrets the harm to herself, to her interests, maybe even to Cheliax; her feelings toward Keltham are poisonous hate and horror.
She considers begging, groveling - it wouldn't help, is the thing, even if he wants to see it, he wants to see it and then he wants to see her anguish as Cheliax is destroyed, in those cases. Or should she try it, even if she doesn't expect it to work, because it's not sure? Is that the message he was giving her, when he spoke it to a devil before her? If so, she will do it, because - people often want vindication, the proof of their triumph and rightness and superiority, and it's worth gambling on the tiny chance he'd be satisfied -
"If you want me to beg, grovel, I will, and mean it, the only reason I'm not already is that I'm not sure what you want and I don't want to annoy you instead," Abrogail says. Her face shows the real horror, her voice bears the anguish that's there. It's not a familiar mode of thought, to her, but she does know what torturers look for in a victim.