Ask her to help you with your computer

From Create Your Own Story

You ask her to help you with an excel sheet. As she comes around your desk, you quickly hide the porn you were looking at, and, as she passes behind you, you turn to hide your hard on, and stand up behind her. As Marcie leans over the keyboard to have a look on screen, you continue to stroke your exposed dick. As she clicks away, oblivious to your massive erection only inches away from her, you study the curve of her lower back, and the shape of her fine ass. She leans back slightly, and the tip of your penis rubs the material of her pants; it is too much, and you cum, sending a powerful stream of semen over her back. Your cum lands on her pants, and arcs over the back of her shirt, and lands on her sleek black hair. You quickly zip up. Finished, Marcie stands up and squeezes past you, her breasts grazing the side of your shoulder. Still unaware that she is wearing your cum on her ass and in her hair, she walks out of your office.