(Context: https://www.furaffinity.net/view/32909115/ )
(Bra version: https://twitter.com/Yttreia/status/.....93951608426496 )

Bixxti's age finally stopped fluctuating, settling somewhere in the 11-13 range, and post-pubescent.
Luckily there was someone assigned to keep tabs on her 24/7; a third of the building was afraid she'd fluctuate to a pile of dust, or that someone would flirt with her while she's an adult and get her pregnant, right before changing back to a younger form. There /was/ a bit of a morbid, scientific curiosity rolling around the facility about the various ways things could've gone wrong, but nothing came of it.

It was the best case scenario, her age settled in her sleep and Lyyona took her to get her tubes tied in the morning.
Afterward, needless to say, Lyyona showered her in different kinds of clothes, got her fitted for her first bra, gave her the "talk" about boys and pregnancy, and generally embarrassed Bixxti all morning in front of various techs and hybrids.

One of the unexpected side effects of this whole situation is that you're absolutely sure that Laela is upset about Bixxti's new body.
Here she is, biologically around twice Bixxti's age, yet this kid has bigger breasts than her!
Over the course of the next hour of testing, you can clearly see Laela sneaking a puff of air into her own breasts here and there, jutting her chest outward whenever possible, and generally trying to avoid staring or looking grumpy about it when she thinks nobody's looking.
At least it seems Bixxti isn't aware of Laela's envy so far.

By the end of the testing, you've had to forcefully empty Laela's breasts five or six times; they kept getting in the way every time they passed the F-cup range.