Cynthia would explain that the Nomen tribe was currently in a state of flux. With their ancient duties attended to, and their tribe still, slowly, recovering, their primary goal, at the moment, was a low expansion and recovery - as such, while they were more than willing to work with him to ensure the security of the grasslands, they, in turn, wanted his protection against outside threats.<br/><br/>While she didn't openly say it, he might notice that she was an eligible female centaur of breeding age, and she seemed particularly focused on the goal of expansion. (Especially if he succeeds at a DC 14 Sense Motive.)