How was Tom's deceitfulness

Well in chapter 6, for example, Tom finds himself in bed and wanting to avoid school that morning. Eagerly, he attempts to avoid school by "playing" sick, groaning and moaning enough to wake Sid, who is sleeping by his side.Once Aunt Polly comes to check on Tom's ailments, he tells her: "Oh Auntie, my sore toe's mortified." After Aunt Polly tells Tom to "shut up that nonsense," Tom then proceeds to tell her about his sore, loose tooth, hoping that maybe it will provide him with an excuse to skip school. Aunt Polly simply pulls out his tooth and sends Tom off to school without another word.Tom certainly isn't malicious rather than spirited and cheeky in his "deceitfulness".