"Thanks for the reply, I’ll add the outline below just to make sure it’s something you’d be comfortable making. Let me know if you have any questions -

Step-Mommy's Mega Milkers:

(Writing from POV's perspective) - You've always been an A+ student in class, and with this breast expansion formula you've created, money and popularity are just hours away. Once added to water, it causes any woman's boobs to grow several cup sizes - a gold mine with the girls at school who are looking to boost their bust. That's why you've invited them over for a breast expansion pool party this afternoon. There's only one thing that you've forgotten about... Your Step-Mom's Early Morning Swim!

She comes into your room, wrapped in her robe (or a large towel - something to cover the transformation), and asks if you'd noticed anything wrong with the family pool recently... explaining something weird’s happened to her... And then it dawns on you! Your eyes widen, and your cheeks blush, realising what must have happened. So you try to play dumb.

But she's on to you now. She demands to know what you're hiding from her. And you say you don't know what's going on.

"You don't know what's going on?!" She retorts and she drops her robe/towel. "My tits are fcuking huge!"

You stare in amazement at the impossible sight in front of you, as your stepmother stands before you with her newly engorged breasts bulging out of her one-piece bathing suit that use to fit perfectly. This isn't helped by your stepmom instinctively bouncing and rubbing as she explains what happened. This is way more than what you'd expected from the results of the formula! They’re so much bigger than a few more cup sizes and even her *ss seems curvier than when you last saw her.

She remains in disbelief as to how could such a thing happened, and you can't help but confess, revealing the whole plan and you were the one to cause her breasts to grow. But you weren't expecting them to grow this big! Wait, that's it! You didn't take into account the mammary glands, jumpstarting the lactation in her breasts and cause them to triple in size! Hearing this, your stepmom does admit that she'd also noticed milk dripping from her nipples. But her stern face returns as she confronts you.

"You did all this, behind my back? ... H*ney... I am very, very... Proud of you." You sit there stunned as your stepmom's serious expression drops into a mischievous giggle. "Sweetie, you have no idea how long your stepmom has wanted a pair of Massive StepMommy Milkers! I mean just look at these bad boys!"

She begins to proudly bounce and jiggle, laughing at your dumbstruck and embarrassed expression. But also eyeing the significant bulge in your pants. She begins posing for you, asking for your opinion, asking how she compares to your l*ttle school friends, your teachers, and the other neighbourhood milfs. They can't possibly compare to your stepmommy now, not with these massive knockers. She's so much bigger than them now. She just imagines showing them off outside and on the school-run. She goes on to talk about how the two of you will need to go bra shopping and get a new swimsuit for her, maybe a bikini.

"Actually... Could you make them bigger?" You can't believe what you've just heard. Your stepmom's true desires are being revealed, obsessed with having the biggest tits in the neighbourhood... Or the city... or the world. She's clearly getting so excited even just thinking about it. You try to explain you don't know how. But she refuses to accept that. The two of you just need to experiment, as she heaves her giant titties free from her bathing suit, and insists you start nursing from them - more sucking means more milk, and more milk means bigger boobies.

She encourages you to keep sucking, praising you for being such a good boy (whilst moaning with pleasure), and the two of you can feel her breasts begin to grow even more. But your stepmommy wants more! Maybe she’ll stop by at school during lunch for a top-up. And those girls can watch you make stepmommy’s boobies grow even bigger right in front their eyes.

All this fantasising is too much for her. She strips off her swimsuit and demands to ride you. She climbs on top of you, ordering you to suck on step-mommy's titties as she bounces on top of your d*ck. She's adamant that this is going to work. She just needs to get bigger. Bigger! BIGGER!

As the two of you cry out and embrace in the heavy breaths of climaxing, she looks down at you, buried in her cleavage, and tells you to go c*ll your l*ttle friends and explain to them the party's been cancelled... You're going to spend some quality time with StepMommy. And she has some big plans for the two of you."

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