Yesterday, I experienced one of the deepest disappointments in my experience of motherhood thus far. Yesterday, Claire got physically violent toward her younger sister. Aerin was trying to climb onto Claire's chair — the seat she practically considers to be her throne — and Claire expectedly became upset. She then proceeded to KICK Aerin. It wasn't so bad. It was more of a slow shove with the foot than an actual kick, and I was right behind Aerin so she fell into my lap. Aerin seemed unfazed by the event and went about as if nothing had happened. But while the kick/shove did not cause any physical harm to my younger daughter, I felt as if I had been kicked in the chest. J and I immediately...