I apologize up front that I cannot offer any advice, but I had to respond since I have a 10 month old GSD (10 months tomorrow) and an 11 year old dog and I know that "look" all too well. Buzz (the 11 year old Aussie) gives me a helpless "make him stop/why did you do this to me" look on a regular basis. Luckily, Ranger has an off switch and generally leaves Buzz alone so I guess I am just lucky.
Hopefully your girl will grow out of this stage. I remember that Ranger was a real rascal a few months ago. Maybe your girl is just going through the rascal stage a little later and a little longer.