Saras slutty outfits have finally landed her in headmasters office. He get's one look at her tight black skirt & knee high boots & immediately orders her to lie across his lap for good old fashioned spanking. He smacks her ass few times over her skirt, before lifting it up to reveal best white thong, which Sara knows is forbidden in this school. The headmaster spanks her round bottom nice & hard, turning her pale behind lovely shade of red. He lowers her thong & continues to spank her bare bottom. Once this OTK spanking session is complete, headmaster orders Sara to rise, pull up her panties & skirt, & return to class.