Liam the Bully.

Ilana was holding Liam for me this morning. He was crying because he was hungry. I was getting a bottle ready when his patience wore out. From the other room I hear Ilana yell, "Ahhh! Mom! Liam pulled my hair!" Then another second later she squealed, "Mooooom! Liam pinched me!"

Apparently the skills to bully your older sister come pre-programed into little boys and begins to manifest at 3 months of age.