He is hearing her talk and complanning about what he just said. So he calls over a waitress to order for the two of them. He had all ready talked about it to the principle there was no way she was going to get in trouble but he just wanted her to be ashamed of thinking about it. So he answers her by saying "You will not get in trouble." That just means that you will have to keep it to yourself unless you are going to need this put into your mouth before we get to school. He then sets a ball gag on the table by her glass of oj and in between his coffee.