When you were little it was her house and her rules, now the roles have reversed and it is your house and your rules. In fact, a rule of no jw literature lying around the house could be helpful as well. What she does in her room is her business but the rest of the house should be a neutral zone. If she insists on leaving jw crap all around the house perhaps it is time for you to leave around the C of C book, 'Reaching jw's in Love' book, Steve Hassan's (sp?) books, printouts from the ARC and so on.
I realize it is mom and all but you still have rights in your home when you are footing the bill.
Tell her no preaching to immediate neighbors either or she will have to find other accommodations. Maybe someone from the kh will take her in (unlikely).