It's all delusions and illusions. Delusions to lie to the self. Illusions to lie to the rest of the world. Deep down, we're all cowards willing to sell our souls to the abyss.
Madness string 83162
Kids have a fundamental sense of fairness and when they see a situation where they feel things are unfair, they will sacrifice their own advantage or sacrifice to punish those behaving selfishly in order to maintain fairness. I imagine that you noticed the injustice in the inequality of how your parents treated you both as a child and used your kid logic to correct that injustice to maintain fairness.