I think there should have been the option to spank Maddie even longer or to use an implement to punish her. The MC said that he was stopping because he was afraid that the other girls would hear Maddie getting spanked but I think it would be better if they did hear it. Then they would know what could await their own bottoms if they displease the MC or if they objected to Maddie's punishment then the MC would have a pretext to spank them too.