Cadance had always been close with her two aunts, Luna and Celestia, but more especially with Luna. As the younger of the two sisters, Luna was closer in age to Cadance.
 
Besides that, by the time Cadance was an adolescent Celestia had already gone to college and developed her outrageous figure. The fact that both Luna and Cadance had similar, more modest builds was something else that they had in common.
 
Luna could commiserate with her niece about Celestia. They would even joke good-naturedly about their voluptuous relative. Like the time Luna found one of Celestia’s oversized bras and Cadance quipped that they could use it to go sky-diving.
 
That’s why it had been such a blow to Luna when her beloved niece busted out.
 
She walked into the kitchen one day and heard Celestia talking on the phone. It was obvious by her tone that she was talking to Cadance, but what she was saying was troubling.
 
“Now don’t you worry. I know a thing or two about bra expenses. I’ll bring you some of my old ones. Goodness knows if you’re like me you’ll outgrow them in no time. But at least you’ll have some support! OK. See you soon.”
 
When Luna asked what was going on, Celestia blithely explained that their dear niece had started on birth control recently. Luna felt ice form in the pit of her stomach.
 
She went on that Cadance’s breasts had started getting tender and swollen. Now none of her bras fit and Celestia was headed over with some of her old undergarments so their niece could have something to wear.
 
Luna was numb. Cadance had always been her ally against the big-boobed onslaught of her older sister. Now she was going to join the enemy?
 
It was a silly thought, worthy of a child. And yet…
 
Over the next few month Candace filled out rapidly. Her bosom expanded until it was nearly the equal of her oldest cousin’s.
 
Damn Shining Armor and his need to practice safe-sex! Luna thought.
 
To Luna’s annoyance Cadance and Celestia started going clothes shopping together. No point going with her, Luna thought bitterly, their sizes were so different they couldn’t even buy bras from the same stores!
 
The whole situation, more that anything, was what set her thinking dark thoughts about Celestia. If only Celestia hadn’t broken up their little trio.
 
It wouldn’t be long before Luna and Celestia’s infamous falling out. Luna wallowing in self-pity on one side and Celestia acting just a little too smug and superior on the other. When Luna went to college they parted on very bad terms indeed.
 
It was several more years before they got over their spat and it was Cadance who made it happen. When she announced that she was marrying Shining Armor she asked, no she demanded, that her beloved aunts be her maids of honor. She took advantage of her bridezilla status and forced them to apologize and make up.
 
And, oddly enough, it worked. Celestia had grown up enough to realize that she had been kind of a jerk and Luna finally put her hurt behind her. Being around Cadance helped with that. The soon-to-be bride had adopted Celestia’s habits when it come to clothes but other than that she was still the same old Cadance.
 
One day, when it just the two of them, Cadance surprised Luna when she told her she had taken up a new extreme sport. When Luna asked which one, she watched in puzzlement as her niece reached inside her shirt and wiggled around. Then she pulled her enormous bra out from under her shirt and held it up above her head.
 
“Sky-diving!” she grinned.
 
It had been many years since Luna laughed so hard.