The Martian Freedom Fighters have a bad history with traitors and spies, and any captives are thoroughly interrogated before being trusted in the slightest bit.
Stoker is very distrustful of any newcomers inte the Resistance, and he gives Turkituck no special treatment. However, later, after her story clears and she's accepted by Throttle and the other Bros, Stoker makes a full apology and they become good friends.