You have been promoted at work to a supervisor post, but it does involve you working some nights in the cashier's office. You take this in your stride, enjoying your newfound responsibility.
Tonight you are by yourself in the office. Tomorrow is payday, and you know there is a large amount of cash in the safe, but are confident that the alarm systems will ensure no-one will attempt a robbery - the place is too secure, and only you know the combination to the safe.
You settle down with a book. It's a historical romance, but it's also pretty racy- the heroine, a confederate spy, has multiple opportunities to couple with those she is spying upon, and she takes them all - all of them described in graphic detail - there's the unionist general who strips her and ties her to his tent pole- fucking her with what she describes as "a cock like a horse," and her co-conspirator, a confederate captain who she herself ties up, riding his face until he comes in her mouth as she grinds her cunt against his tongue...
All of this has you pretty hot between the legs, and you check that nobody is anywhere near the office, then sit behind your desk and hitch up your skirt, stroking the gathering wetness of your pussy lips as you read about the heroine's latest exploit, involving two cavalry captains who fuck her to exhaustion...
Your fingers are moving faster now, and your climax is close, eyes closed, head flung back as you slide your fingers into your wet pussy. You suddenly hear a sound, and your eyes fly open. There is a man standing there, dressed all in black - a tight fitting outfit of black Lycra that hugs his obviously muscular figure. He is also wearing a mask, which covers his face, but leaves his eyes and mouth and jaw free.
"I was going to say "put them up, this is a stick up," he says "but I see you already beat me to it." You instantly realise that this man is here to rob the safe - why else would he be dressed in this fashion? You tell him there's nothing here of value, and he laughs softly as he approaches you.
"I've done my research darling," he says, a quiet growl in a faint accent, a deep voice of a man obviously used to getting his way. "I want that money, and I intend to get it - I worked too hard on this security system to be frustrated by a night manager."
He twists your chair around to face him, noting with interest that your skirt is still up around your waist. He picks up the book you have been reading, and looks at the page you were looking at when he came in. "Nice," he says "beats technical alarm manuals, that's for sure."
"Now," he puts his hands in your hair, forcing you to look into his deep blue eyes "tell me the combination."
"I don't know it," you say, and he twists his fingers in your hair, pulling your head further back "I know you do," he whispers, his hot breath in your ear "and I'm going to get it out of you. And I think I know how..."