The author's portrayal of Leslie childlike naviety or I suppose ignorance of the malice that the Sperado's hold towards her here is pretty spot on.
Despite knowing of the atrocious lengths, the Sperados would go towards trying to achieve their goals, Leslie basically believes that after Noble Trial the Sperados were incapable of touching her again. Which is true to a certain extent, they can't "directly" interfere with her anymore.
Also I know Leslie doesn't want to rub Amroa the wrong way, but anyone looking at this from outside would think the situation was awfully suspicious or too convenient. Which has been noted multiple times as shared concern by everyone in Salvatore family and Salvatore estate, but Leslie sort of brushes it off their concerns going as far as pushing away the guards who are meant to protect her, and not waiting for the rest of other knights.