Sometimes I wonder why I umpire

[Alaska Ump]

I would simply take the coach aside and calmly explain that we don't put up with that kind of nonsense and if she can't control her players someone is going to get tossed and, with only nine players, she probably doesn't want to see that and neither does anyone else. If they keep it up after the warning, it's the player who gets tossed who is a factor in the game, not the umpire.