Too funny. I bet YOU are her favorite in-law - whatcha think?
I have a similar situation with my wife's family - all Democrats. Years ago, they would try to gang up on me, but after they kept on losing the arguments, they decided to call an indefinite moratorium on political discussions at family gatherings. I was never the one who instigated such conversations, in the first place, but I was always only too happy to bring them to a close with their dumbfounded silence.

The essential American soul is hard, isolate, stoic, and a killer. It has never yet melted. ~ D.H. Lawrence