Churning

"Monstrous" isn't exactly the right term. Your new appendage is certainly big, but not inhumanly so. You've seen bigger.

In porn.

Maybe.

Either way, it's clearly bigger than anything Joanne has had to deal with before, and she is transfixed. She hasn't moved since you revealed yourself, eyes glued to your crotch.

You flex your enlarged penis, making it twitch, and she jumps a little at that, getting back to the here and now. She closes her mouth and straightens up, but her eyes never stray.

"Ehm. Right. So. I will just... get to it then. Yes?"

"In your own time ms Dupert" you say and lean back. The attention is making blood rush to your lower body, slowly inflating your impressive endowment.

"Right...". Joanne walks towards you with unsure steps, and places the mug on your desk. She then kneels down in front of you, and looks up at your face nervously. You give her a reassuring smile and nod towards your crotch. She swallows and looks down at your slowly rising cock.

What cleavage she wears is on full display from this angle. A deep crevasse between her disproportionate breasts, and even though you were convinced they were fake they jiggle in a very natural way when she adjusts her posture. Your gaze is drawn down into the darkness, and you feel yourself
getting even bigger, swelling in both circumference and length. You vaguely remember reading that the average vagina was only around 10 cm long, and that most women had serious difficulties with penises longer than 17 cm. Judging by what you're feeling from Joanne, and the way she's acting, you get the impression she doesn't have that kind of compunction, cause you went past those numbers a while ago.

Swallowing again, she reaches out a hand and gingerly puts the tips of her fingers halfway up the shaft. When she touches you, she inhales, and you give her clit a light flick that makes her twitch. She then strokes you gently all the way down to the base. Her fingers bump over the veins that are now bulging from the blood flowing in them, and she traces your length with both fingers and eyes. When she is down in your pubic hair she reverses and trails her fingers back up, up, and up, ever so slowly exploring this monument to masculinity. When she reaches your head, she stops. She stares at it, and the sizable glob of glistening precum that is forming at the top. She pushes her fingertips around, trying to grasp your cock in a fist, but she doesn't reach all the way, having to settle for a half grip.

She looks up at your face again then, something like an apologetic look in her eyes. You smile while giving her another gentle flick, and she swallows, returning her gaze netherwards. She brings up her other hand, middle finger outstretched to touch the precum threatening to spill over and run down. She inhales again when she makes contact, the thick substance sticking to her finger as she draws it out in a string, utter fascination on her face. She spools it down and around your glans, covering your frenulum, your crown, and moving back up to your urethra. Her finger is coated and shining, but more keeps pouring from you. Joanne moves to envelop your glans with her palm, coating her hand in your fluids, and moving it down, beginning to rub your shaft and spreading the lubricant. She works both hands this way, rubbing your shaft with one while palming your precum with the other, then switching so you are covered all over.

Your increased girth has not lessened your sensitivity. If anything it's the opposite. There's simply more to touch, more to feel, and Joanne seems intent to not let a single square centimeter remain untouched. She's really good at this. Naughty girl.

By now she's working your cock like she's churning butter, moving both hands up and down in certain, forceful strokes, tits jiggling with every movement. You can feel her getting into it, forgetting her situation and cover story. You notice her moving back and forth on her knees, mouth agape and breathing heavy. You push her a little more, while moving your tongue in hard circles on her clit, and she picks up speed and enthusiasm. Her tongue darts out and she licks her lips, unable to contain small moans and pantings, looking for all the world like she wants nothing more than take this cock in to the hilt.

This is too much for you, the increased sensation, the new obscene monolith between your legs worshipped by this stuck-up executive, and you feel the same feeling you did last night, where an orgasm builds from a space outside your body but still your own. You grit your teeth and grasp the arms of your chair, thrusting up slightly. Joanne notices your contortions and manages to say urgently "Wait, hold on, let me get the cup”.

As she turns around to grab the cup, one hand still on your member, you grab it and push it down, aiming straight at her. The act, the anticipation, the power, pushes you over, and just in time for Joanne to turn her face back to you, you release.

A torrent of cum erupts, more than should be physically possible, and Joanne only has time to say "Wai-" before you cover her. Cum spurts into her face and open mouth with an audible splat, spreading up and into her hair and down her chin, hitting in heavy waves against her tits and filling the cleavage between. You push into her again and you feel the arousal overcome her, joining your orgasm with hers.