Sharing

I'm going to have to work on little sister's sharing skills. Big sister was about to head outside while I was serving dinner, so of course I told her it was too cold and we were about to have dinner. Little sister, not to be outdone, opened the back door herself. Big sister proceeded to tell little sister exactly what I had just said about it being too cold and little sister got a little upset. She shouted "NO! It's MY cold!" So apparently, it's her fault it's so cold?