A nice punishment that can be carried out around children is one that is often assigned to young misbehaving school-children...writing sentences. Give her a sentence at the top of a page, tell her to to sit her butt down in a chair, and not to move until she has copied it 50, 100, 200, whatever times.

It's not exactly hardcore pain action or anything (hand cramps aside) but I've found it can be extremely effective and also pretty humiliating (if you and she are into that kind of thing.) If the kids are old enough to read what mommy is writing though, you may have to be careful about where you sit her and where the kids are.