Yeah, because incest would be like actually doing sexual things with their sister but I don't think beating up a four year or slapping them on the butt would be good.
The classic way. Fists and feet. Gets the job done without getting you in as much trouble as using, say, a bat or a broom would. The added bonus is that it keeps her scared of you.
Lol, I wonder why this reminded me if crazy hat day at school and I wore my Jessie hat, and a kid cane up behind me and said, "meet your maker, Jessie!", then I knocked his hat of of him and he gave up saying I won. Don't ask why I thought of it.: