Simon said: Then you make the rules. Kick the cart out, if she doesn't like it kick her out.You would be well within your rights to mandate no cult literature be brought to your house.
Our Mom moved into my brother's house for a couple of years. He told her no preaching to his kids. He did allow her to have a Bible study with some old woman who was almost blind and still driving (she was a hazard on the roads as I followed her one day going to my brother's house... holy cow!).
But it was strictly no preaching or discussing their religious crap with him or his family. Way to go Bro!