«Hanna's Deception» by Ginny Watson

Erotica author Hanna has just caught her proofreader giving herself a little “under the desk” relief, was it one of her stories that drove sexy young Jade to masturbation, or was it something she saw online? Determined to find out for sure she waits until the office is empty then checks Jade's browser history, only to find that her colleague is an exhibitionist, and so begins a very kinky game.