"She is my mater, and we have formally declared rivalry with each other. The situation with Tranquillina is... complex. I'm not at liberty to go into details, but suffice it to say that Cumhachd considers herself Tranquillina's mater, Tranquillina does not consider herself Cumhachd's filia, and both those competing worldviews have some justification behind them."
Stultus is silent for a moment. "Yes, she insulted a brother Flambeau. Yes, she raised the alarm. Yes, she made veiled threats. She will continue to do so, in order to get a rise out of you. She will probably go beyond veiled threats -- there's something truly sneaky and underhanded coming up, I'll eat my hat if there isn't. And yes, there is a danger of collateral damage."
"Here's the thing, Roberto. It IS a Tytalus thing. She is here for one reason and one reason only: to pose a challenge to Tranquillina and myself, and see how we deal with it. If you interfere -- if anyone else interferes -- she will try harder, do more damage in the process, and if she goes away unsatisfied she will return, and she will return soon, with more insults, more threats, and more collateral damage. The more you interfere in this private Tytalus matter, the greater the danger to Mons Electi!"
"I know you will do your utmost to defend the covenant. I honor that. And if this were anything else, there is no man I would rather have at my back than you. But in this one instance, the covenant would be -- in the long run -- best served by you keeping your temper in check, and interfering as little as you can. It's a paradox, but please believe me when I say that it is so." He sounds almost pleading in his attempts to make Roberto understand.