Between snow days and sick kids, the three kids and I have been in the house all week long. We made it this long with our sanity intact because being sick slowed Babs down, but she is back to herself again, and there was some friction between the girls.
As I explained to them, I was entirely unclear whether I was more exhausted from Babs' pushing (both literally and figuratively) Kiddo around, or Kiddo wailing each time it happened. But then there was hitting; Babs smacking Kiddo for one reason or another. (Had it been the other way around, it's entirely possible I would have ignored it.)
By round two, she had an immediate time out. By round four, Daddy was home, and he enforced the time out. After Babs was let out, he asked, "Now, do you understand the difference between hitting and playing?"
She immediately replied, "Punishment."