Maddison's POV

As you drive away, you look back frantically to check you're not being followed. It's a stupid, irrational fear: there is no reason in the world your sister Jessica should harm you, but you are unsettled by the inadmissible thoughts you had just a minute ago, and by the warmness that is spreading all around your body.

"This is madness! I'm a respectable woman and she's my sister for God's sake!". You reflect your distraught eyes in the mirror, trying to make sense of the situation. The traffic light in front of you is red, thus you stop.

"She's my little sister." Nonetheless, you have to admit she has grown into a beautiful woman too, a woman that you have known all your life. Except that she seemed strange today: there was something on her face that you've never seen before, and her clothing, her behavior, it was like she was dreaming your same fantasies... ah, those, those boobs...

The honking of horns makes you gasp. The light is green, but with horror you find that your hands have traveled down your suit and are lying dangerously close to your intimate area. You hit the accelerator making a sharp skid.

"This can't be really happening! I must be tired, there is no other explanation! I could never, ever even think about certain obscenities!". Besides, it's mostly her fault. The way she talked to you, it's not the way you speak to your sister, isn't it?

-And it's just an innocuos fancy, nothing serious! She basically said that I'm her life model, right? Anyone would imagine similar things after that.-.

"Yeah, anyone. But not her sister...".

-Oh, come on!- You say loudly (although no one is listening to you): -They are just harmless fantasies! She doesn't have to know! And even if... I'm her older sister! She wouldn't complain!-.

"Why am I saying this? How could I ever consider the hypothesis... I couldn't! It's wrong!" On the other side, nowadays it's common to have a hidden side, act differently when nobody is watching, and indulge in bizarre fantasies. No one could judge you, especially with a sister like Jess. Let's spell it: she's hot! There's nothing bad with admitting it, you are too, what's wrong with that? It's a fact!

-My my, I can make her think everything duh?- You question the air: -Even this... Jekyl and Hyde act. You're quite a perv, right auntie?-.

Ooookay, that's really weird to say. You woke up this morning normal and now you're into roleplay. A kink one, it seems. This is alarming... no, it's just a bit over the top. Actually, know what? 'Could be funny. You chuckle at this consideration: you, the proper Maddison Allen, an honest work lady and a mother of a family, are secretly an **** fetishist! You, with a clean face like this one, and a mature body like this one...

-Mmm... oh fuck!- You slam on the brakes, avoiding a rear-end collision with a car that, miraculously, doesn't realize it and keeps her going. Hands on the wheel while you're driving, Maddie, not on your... whatever, you have luckily reached your destination and you turn to enter the parking lot. The worker at the bar greets you by name, working here since before you. Such a loyal employee, you reason, deserves recognition. You blow a kiss in his direction and you wink seductively, leaving him stunned. When you dismount your legs almost betray you.

"Oh my God, I really did it! I hope he'll never tell anyone!".

-Well, if he does I can fire his ass.- You conclude, and you march into the elevator. When you're at your plan, your employees cordially inform you that Mike has gone downstairs, but he'll be back in a minute. You notice that some of them, mostly males, seem to be distracted by your jacket, but it's not dirty or else, the same applies to your breasts on display. Strange.

You decide to wait for him inside his office. Once in, a devious idea forms in your mind. Your poor husband is so stressed, he needs a pleasant distraction, and of course it's his wife's duty to provide it! You get undressed, remaining with your heels and your black lingerie (which actually you don't remember choosing this morning) and you lean against the desk, with your back to the door.

About thirty seconds later, someone enters.

-Hey honey, you're he... wh-what?-.

-Hello Mr. Allen.- You purr, eyeing him like a falcon his pray: -What can I do for you?-.

-M-Maddison, what are you doing?- He asks dumbfounded, a welcome bump forming under his trousers.

-What's the problem, Mr. Allen? Is there something on my face? Or on my... booty?- You twerk your cheeks, bewitched by your own play. You never thought you could... instead it's so easy!

He's unable to say anything, so you keep going: -May you close the door, Mr. Allen? We don't want anyone to disturb us, do we?-.

He basically slams the door and cautiously moves towards you.

-Maddison, I, this is not the place for...-.

-It's not? Why sir? Where should a secretary make his chief comfortable if not in his office?-.

-You-You're not my secretary...-.

You gasp clutching a hand to your heart: -Mr. Allen, are you firing me? Oh, you're such a bad boy!-.

He stops right in front (or behind, depending on the point of view) of you, mumbling something incomprehensible. You fight the impulse to laugh and to quit your charade, instead you act despaired: -What will I do now? Oh, I get it! I can be your personal slut-toy!-.

You grab his frozen hand and put it on your bubbly butt.

-Come on, Mr. Allen. You can do everything you wish to your slut-toy.-.

-M-Maddie... you... you're really...-.

You start to move around his hand, shifting your fat ass with your circles and moaning in the process. Finally, he zips down his pants and reveals a huge erect cock, which he presses on your back entrance. You feel it throbbing in awe. You wide your hips and it slides on your pussy, its tip makes its way between your labia.

-Ohh... Mr. Allen... Ohh... OHH!!!- It's full in and you can't retain a loud groan, and again when he withdraws and starts pumping. In no time, Mike is naked and has got you by your sides, slipping his member within your sticky walls.

-Oh God! Mr. Allen! Yes! Tell me I'm better than your bitchy wife! Tell me I'm better than her!-.

-M-Mad-dison-I...-.

-Say it!-.

-You-You're so tight! You're better than my wife! She's not good like you!-.

For some reason, this is what you wanted to hear. Mike is on the edge and you bit your lip in anticipation. You cum together and you lay down one upon the other, drained out but happy. You in particular, although you don't know exactly why.

"It's as if... I have become someone else... someone better... someone hotter...".

And you like it.

-Do you think they heard us?- Mike pants, his chest still pressed to your back. You smile.

-Boy, I hope they did.-.