How do you feel about "move her off the plate"?If done right, giving the umpire a head’s up may not be a bad thing to do. Be aware though, the umpire cannot make the batter move off the plate.
It is not illegal for the batter to lean out over the plate ... up until the point that the pitch enters the same space. A ball that hits the batter in the strike zone is a dead ball strike.
M&R Davis may be right that many umps don’t like making that call ... but I have a touch of evil in me and I love making that call. Especially while the batter is running down to first base. It’s actually pretty rare though.
PS — just a bit of friendly advice ... I would highly recommend that you avoid saying the words “hit her” if you are coaching. Or parenting. Or playing. Just don’t say it.