The women's bathroom seems like a good start

There was no more private place for a woman on any floor than the women's bathroom, of course. "Brilliant, Margot! See? You've still got that all-business brain, no matter what this guy says," Margot Ivey applauds herself, while making her way past rows of cubicles toward the only restrooms on the floor-- a poor amenity for an office this size. Thankfully for her, the office, like all American offices, is still unfortunately and disproportionately slanted towards male employment, so the women's bathroom is not nearly so busy as the men's. She pokes her head in nervously, then sighs in relief, seeing only one stall closed. "It's not in there, is it?" she hisses.

"No. No it is not. Although, damn, that would have been a funny place to put it," Mammon responds, sounding a bit wistful. "For this room I decided on something quite... classical. I didn't need to hide it so cleverly, since there's no need to keep it out of sight in such a low traffic area."

"Is there any 'classical' place for a guy's penis to exist inside a women's bathroom?" Margot questions quietly, while casting her eyes this way and that for some sign of a demonic shaft or evil balls nestled anywhere inside the room. Cautiously, she begins to nudge open one stall after another. Each looks more normal than the last: blessedly clean and inoffensive, but dull and uninspiring, as toilets tend to be. Just as she begins to believe that she'll be **** to root through the trash to find it in there, she comes upon the discovery she's been waiting on. "Holy crap that is a massive dick," she remarks out loud, seeing a big, veiny, jet-black penis bulging out from a wall forming the side of the stall. It looks almost like Mammon is using a gloryhole, although she knows for a fact he isn't really on the other side.

"What was that? A dick?" the girl two stalls over questions.

"O-Oh, yeah, my boyfriend just sent me a picture of his huuuge dick. Wow!" Margot laughs, beginning to sweat as she ponders the logistics of servicing the object in front of her. As she stares, it twitches, wanting and waiting. "You're actually kinda excited for this, huh?"

"I've allowed you to ripen for ten years, my darling. I am eager to reap what I've sown."

"I'd say I'm flattered, but..." she murmurs, then trailed off, closing the stall door and locking it behind her with the slide lock. "... How's it taste? Is there like... a weird flavor to it that the historians didn't record?"

"You're about to find out. Put that witty mouth of yours to good use."

Margot grumbles, then positions herself with her palms pressed against the stall's wall, allowing the cape to fall open and reveal her indignantly squatting form. The position of Mammon's phallus is such that there's no other way to handle the protrusion. Experimentally, she moves one hand to touch the shaft and rubs its length, feeling it throb. Despite the apparent excitement, Mammon does not seem pleased.

"Mmm, no. You are going to slobber it, or you're going to lose that cape."

"Okay, okay! I'll just..." the CEO of the Modern Royalties Corporation babbles for a moment, then crosses her eyes and sticks out her tongue, making a ridiculous face. Gingerly, she begins to rub her tongue up the length of the slowly erecting penis, which is only growing in size. The taste is... that of a penis, just an over-sized one! The musk of masculinity coming from it is extremely strong. Her glasses slide down the bridge of her nose as she tilts her head to run her tongue along the side in the reverse direction. The massive shaft casts a shadow over her face as she squats lower and looks up to run her tongue along the underside, making an appealing, slobbery noise as she does. "Geez, this is going to take all day..."

"It will if you don't put your back into it," Mammon agrees. "Don't forget the balls."

"Oh, I need to... do those too, huh?" she questions, seeing them in her face as she reaches the base of the shaft. "Those are some... great big balls." Hearing the flicker of her cape beginning to burn at her hesitation, she finds her courage, then begins to suck noisily upon the sack, grabbing up as much into her mouth as she can manage. This isn't a problem she would face with a regular human's dick, where the balls are of a proportion where a girl's nibbling or sucking at them can be considered a cute diversion. Here, the balls were nearly the size of her face. It was proving quite a task to fully service them and meant gobbling a lot of ballsack. "Jesus Christ... Where do you buy pants?" she jokes, while lolling out her tongue and flicking it up and down the testicles. "At least it isn't hairy..."

"Oh, not to worry. This is the largest of all of them. I figured I'd put the least convenient one here, since it would be quite indiscreet anywhere else. That means I want you to approach it with no reservations, understand?"

The woman nods, pursing her lips and running them back along the length of the shaft towards the head. Once she reaches it, she opens wider, putting her tongue against the tip and moving it in a circular motion. She managed to fit embarrassingly little of it inside her lips, but the twitching seemed to imply the effort was appreciated all the same. "I forgot to ask-" she speaks messily around a mouthful of dick, with drool dripping from her lips. That liquid is joined by another-- a huge, powerful jet of cum, shooting from the head into her mouth and coating her face, hair, and breasts. Once she begins to gather her senses, she moves her face away, only to find the cape pushing against her neck and forcing her back onto it. With her mouth closed, the demon semen goes all over her lips and chin instead. "Oh. My. God..." When she finally pulls away, she finds the floor coated in the stuff, as is the toilet seat and even some of the wall behind her. A few post-it notes can be seen in the pool of cum as well, having been knocked from her by the **** of the blast. She feels sorry for the janitor who was going to be **** to deal with this-- it looks like a scene out of Ghostbusters. As the dick goes flaccid, it also vanishes, much like a ghost itself.

"Mmm... quite satisfying... I was worried you'd be unable to find a satisfying way to do that one, but you managed swimmingly."

"'Swimming' is right! This is like, a comical level of cum!" she shouts angrily, red-faced beneath a mask of white goop.

"What?" the girl a few stalls over asks, sounding concerned.

"I... don't even know how to explain this one," she answers, exasperated. "Do you have a way to wash this off, Mammon?"

"I do not. However, I've got a remedy for you."

"What?"

"You've been swimming, remember?"

"... Oh, screw you, buddy," she sighs, rolling her eyes as she wipes away as much of the stuff as she can with her cape. Once she finishes, she is slightly more presentable, if damp and obviously smelling of jizz. "Let's see if we can get a nice, normal-sized one next. It's kind of hard to enjoy when the thing's as big as my torso."