One of my older sisters is a SPN fan too, so I was amusing her. Don't need to actually know the series to understand how Michael, Lucifer, and Gabriel really know way too much about one another.
( IF YOU'RE NOT CAREFUL, DAD'LL GO OLD TESTAMENT ON YOUR ASS AND THE LAST TIME THAT HAPPENED THERE WERE RIVERS OF BLOOD AND SHIT AND I WAS PULLING FROGS OUTTA PLACES THAT FROGS SHOULD NEVER HAVE GOTTEN INTO. )
Then I shared some Wincest with her.