There is many things that Mayeux talk about with Aeryon.
It is not only the matter of the tribes , it is also the movement of other tribes, the movement of their allies, Aeryon generals and officers.
"As for Ayera….I don't know what will happen to her now. His brothers would fight each other and…" but he did not finish this thoughts.
If he wanted to planned against the Kan wife, he still needs to know the Kan thoughts.
Even though the Kan knows that the Viper did not send his daughter with nice intention, it is true that Aeryon still treat Ayera quiet gently and give her a lot of power.
But only Mayeux could see the hidden intention of the Kan.
Yes, he gave her freedom to talk with anyone and gave her freedom to gather her forces.
But none of these forces could threaten Aeryon influence of power.