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Fuuka and her StepMommy Lacey have a close bond, which has only become closer as Fuuka’s developed big, beautiful tits. As her tits have grown, Fuuka has been getting more feminine and extremely ditzy - some people would even call her a bimbo. But her stepsister Stella is feeling left out, she still has smaller tits and doesn’t know how to dress girly. She’s jealous of how close Fuuka and her stepmom are.

When Stella breaks down and confesses this, Lacey lets her in on a little secret: she’s been letting Fuuka help herself to some special growth hormones, straight from the source: Lacey’s big StepMommy tits.

Something in Lacey’s breasts has these incredible properties. All she has to do is suck and drink to get her fix. It’s made her boobs get bigger and also made her more feminine. There may be some side effects, too. such as lowering her IQ. But that doesn’t really matter if you get big boobs, does it?

Stella is shocked. They’ve been doing this together, but didn’t include her? Isn’t this a little weird? With her only other option being cosmetic surgery, tiny titty Stella is desperate. She’s ready to try even the most unconventional methods to get big, bouncy boobs like her stepsister.

As she tentatively sucks on Lacey’s big natural breasts, hormones start flooding her body. Fuuka eagerly partakes of Lacey’s other breast along with her stepsister, and they both moan with pleasure as they get their fix. Just as Lacey predicted, it has an instant effect on Stella, whose chest quickly swells and grows - until her breasts are big and almost bursting through her tight white shirt. Stella’s new tits may be even bigger than Fuuka’s!

As the strange hormones flood their bodies and minds, Stella and Fuuka both become dumb, giggly bimbos again, and their libido kicks into overdrive. Rubbing their nipples and breasts feels SO good that all three of them begin rubbing and stroking their swollen tits. The rubbing leads them all to a “tittygasm”. Which is so much more intense because they’re all doing it together! Big boobs are so much better! They’re absolutely addicted, and they both want to get even bigger titties with their StepMommy’s help!