On a miss (you are interrupted, and a new girl appears)

Bad girl Jessica is on her knees, ready to suck your cock, when the bathroom door opens. Standing in the open doorway, looking shocked, is shy brunette Danielle. Unlike Jessica, Danielle's school uniform is in perfect order, her white blouse buttoned up, her jacket and tie hiding her pert little boobs, her regulation-length skirt showing just a flash of leg above her knee-socks. Danielle's brown hair is tied back in two long braids. She has large, round glasses, and an armful of books.

"Oh! Um ... uh," she stammers, "I'm sorry! ...what are you two doing?"