I Spilled My Brother's Milk On Purpose

So my brother's always hogging the fridge and eating everything I want. Yesterday, he was down in the kitchen with a big jug of milk that looks suspiciously like it once belonged to me. I've been wanting it all week for my cereal. So... I took matters into my own hands. When he wasn't looking, I poured his precious milk on the floor, right by the fridge. I thought I did it perfectly and walked away, but mom saw what happened. Told her it was an accident and spilled it when reaching for a snack. Yeah, like she'd buy that from me! But now my brother is angry because he thinks I'm being selfish with his milk. I don't feel too bad though. It was worth getting some of that milk back.