Can I have some milk for my latte?

You turn around to face a striking woman in her 40s. She stands confidently right behind you, her figure accentuated by skin-tight jeans that hug her curves perfectly. Her top is a simple white garment with thin straps that barely hold up her ample breasts, which have the natural sag one might expect at her age but still appear full and enticing. She holds a mug close to her chest, and a faint wisp of steam rises from it, adding a cozy warmth to the scene.

“Would you be so kind?” She asks with a smile, her eyes twinkling with mischief.

You decide to play along, a smirk playing on your lips. “I’m sorry—did you say cum?”

“Oh, yes!” She pushes the mug towards you, her voice upbeat. “I would like to drink a latte, but it does require a large amount of… milk.”

You lean back in your stool, trying to maintain a composed demeanor. “I think you’ve got the wrong person. I’m just—”

“Oh please…” she interrupts, taking a step closer, swiping some of her lush blond hair over her shoulder. “I am sure a young man like you can be extremely helpful when it comes to lattes.”

“But, I dunno, this is all so sudden…” You respond, feigning innocence, your heart racing beneath your calm exterior.

“I can help, naturally,” she says without hesitation, giving a quick glance at her breasts, subtly guiding your eyes towards them. “We can make this happen rather quickly, if we put our minds to it.”

“How do you propose we go about this?” You ask, your curiosity piqued, eager to hear her talk dirty. Her breasts seem to move freely and with considerable weight. Her skin is full of tiny freckles, which seem to concentrate on her chest. You notice this gives a better sense of volume to her already appealing tits. You wonder whether the new reality you have just created will make it easy for you to see those boobs, or whether that kind of action is still out of bounds.

“Don’t be silly, there are plenty of ways, of course.” she replies with a hint of desperation in her voice. “What about you jerk off into my cup while looking at my boobs?”

You glance around in disbelief, half-expecting other customers to turn their heads after hearing such a bold statement. By the looks of it, the Rulebook is working perfectly, as no one seems to have noticed or cared.

“Yes, I guess we can do that.” You reply, your voice steady despite the surge of arousal you feel. You've been horny since the moment you wrote the new rule, and this encounter is only fueling your desire.

The woman’s face lights up as if she’s been handed the Holy Grail. “Thank you, darling,” she said, clutching the mug to her chest, her eyes gleaming with anticipation. “You truly are adorable.”

You decide to stand up, as you don’t feel the need to hide your boner any longer. You wait for a second or two, wondering what to do next. The woman does not react, and slowly lowers her eyes to your crotch. You suspect she expects you to jerk off right there and then.

“I hope you don’t mind me asking.” You are not sure whether you can actually do that in public. “Is it ok for me to do it right here? I mean, take out my… you know… masturbate?” You lower your voice as you ask this.

“Haha, you silly!” She covers her mouth to cover a genuine laugh.

You expect her to answer your question, but she just looks at you with a big smile. You take this as a yes, it is ok for you to flung out your cock and jerk off into this lady’s mug. Slowly and hesitantly, you unzip your trousers and push them down together with your underwear all the way to your knees, letting your stiff cock spring freely. You do this while looking at the woman, exploring her reactions, and you are glad to see an eyebrow rising up and her smile to widen slightly. Your cock is large and long, and you enjoy seeing her appreciation. One girl from a nearby table stops talking. You turn in time to see her friend also turning towards you. You shift sideways enough to give them a good look. They look like college students, both pretty, and don’t seem bothered by a random dude taking his cock out in the middle of a public space. One of them grabs what looks like an expresso cup and drinks up whatever was left, and places the cup on the table, close to you, and looks you in the eyes, expressionless. They seem prepared to watch the show, which kinda spurs your lust somehow. You had not realised before that you had an exhibitionist streak. You get interrupted by the middle aged woman approaching her mug towards you, as in establishing that she has first dibs.