You told her all the right things sweetie, now this might sound a little misleading but maybe it'll work. If you go up to your taskbar thingy, and click on history you can right click the site you dont want people to see and it will give you 2 options, delete or expand you click delete a little box comes up saying do you really want to delete whatever your thing is called you click yes and it is gone, poof, magic

hope something works out for ya'll much love melissa