[ Bulma's not entirely shocked by how short the dress is. She herself was known to wear quite short skirts and shorts, even after having two children and the lot. She can't help it - she looks good, and she knows it, so why not show it off a little, right?

So she has no place to tell Bulla not to wear it, really, other than - ]

Let's not wear that one without tights in front of your father, uh? He's having a hard enough time with you being walking and talking without adding on mini dresses.