Totally agree with you. There are very rough, but perhaps justifiable, things that ought to be done to guys who get nasty, or abuse, the opposite sex in any way shape or form.
I figured Buster would be the ticket to "no more visits" (success) with the MIL. Many folks are scared of GSD's.

A female GSD in March? Cool. Are you guys planning on breeding them? Female GSD's can be significantly more headstrong versus the males. Males learn very quickly that you are Pack Leader. My Carli is 8 and she still likes to test me for pack dominance. None of the males we had tested us much after reaching some maturity 2-3 years.