Supervise more , so you know hat is happening around her, you say she tries this with her Dad and brother, is this an older brother , so what do they do when she does this, it sounds as if this has been a learned or a copied behavior , in my opinion be aware , not a good idea to allow small children to play without some supervision..If she is doing what you describe she has seen it or had it done to her ...nip it in the bud tell Dad aswell to .do the same ...