Pardonable vs. Unpardonable Actions: Should Cassian trip Ruby intentionally or play fairly?

Cassian and Ruby have known each other long enough to know exactly which buttons not to push. One day, they are practicing at the park when Cassian accidentally trips Ruby, causing her to fall and hurt her knee. Cassian feels terrible, knowing it was an accident, and apologizes immediately. Ruby, though in pain, understands and forgives Cassian, recognizing it was unintentional. Later, during a school soccer match, Cassian is frustrated when Ruby scores a goal against his team. In a moment of anger, he considers tripping Ruby on purpose to prevent her from scoring again. However, he hesitates, realizing that acting out of jealousy would be unfair and hurtful. Cassian Every option has its cost.