Keeping up with a baby is a full-time gig. Just ask my two-year-old, who always seems to have her hands full making sure that baby Roxy doesn't play with things she shouldn't play with. Or taking toys that she is allowed to play with out of her hands. Or placing toys in front of her just so she can take them away two seconds later.
They say at this age the older kid has a hard time with the creeping realization that the little one isn't just another temporary houseguest. Edie takes the attitude of a small-town sheriff, with the baby something like a teenage hot-rodder who's rolled into town for repairs. Edie won't cross the line into outright brutality. She sees it as her job to behave in a sufficiently harassing manner so the young troublemaker doesn't get any ideas about staying put for a spell.