I'm actually annoyed they didn't add her to the cast. Too few characters now days. They could have really had fun with her character by showing her wrenching on the cars, fixing radiators and other funny things you wouldn't expect - like when she mentioned waxing the car.Speaking of logic, or lack of it, it sure would have made sense for the boys to ask Mrs. Butters to stick around and help out in the final battle. Why go off to the woods and bunnies when Chuck's about to end it all.
"I cleaned all the guns. In the process, I noticed the sight on the colt was a bit off to the left. It's calibrated now. You wouldn't want to miss and waste those witch-killing bullets...."