Keltham watches her go with a somewhat uneasy feeling that he's been socially-pressured into doing something riskier for Pilar than he should. She was slated to take the Worldwound oath, right? That's - Golarion adulthood? She wanted to take this risk and had her reasons for it, there were arguments for it...
Well, what's done is done; if Keltham wanted to question this, the time for that would have been several days earlier when he agreed to this.