

Upon opening it, it causes a loud commotion that causes the school librarian to come over to see what its about. He helps the duo access a pornographic site until they come across an illegal photo that is forbidden by law. Throughout the school day, the duo are constantly on Stewart, encouraging him to give them their porn, even going as far as standing outside a toilet stall that Stewart is in until he finally gives in. They see Stewart talking with a classmate in the Library, which Butt-head sees as a solution to getting their porn. Upon hearing this, Beavis and Butt-head immediately become interested and figure out a way to get their "free porn". Van Driessen teaches students about computer safety, and avoiding inappropriate sites such as pornography.


However, there are exceptions that seem to imply she does know what terrible friends the duo are to Stewart, but still lets them hang out with him for some reason, such as when she explicitly expresses worry towards the duo's influence on her son (" It's a Miserable Life") She believes that Beavis and Butt-head are good friends of her son, most of the time being oblivious to their antics and their negative influence on him. She is also often depicted as rather clueless but amicable, being one of the few characters to not mind the duo she enlists the duo's help when Stewart disappears (" Stewart Is Missing"), and she trusts them to take his homework to school for him when he is sick (" The Great Cornholio"). Stevenson is portrayed as a doting mother towards Stewart. In Beavis and Butt-Head Do The Universe, she is drawn with wrinkles under her eyes. In Stewart's House, she is blonde and has a Southern accent, but for the rest of the series, she has dirty-blonde hair and possesses a thick Midwestern accent. She is a middle-aged woman with blonde hair, a pink long sleeved shirt with white collar and cuffs, and a blue skirt.
