Wendy sat in her sister's convertible. And gave a long stare at her sister's generous bust.
Yes, Vanessa had it all. Tall, pretty, thin, busty. But that last part... her bust was what made her so popular. More than the rest. The way she stretched her shirt proudly while making fun of Wendy's flat chest had made Wendy very, very jealous of her. She had prayed every night for some growth, while some girls from her class were already up to C cups.
So Wendy decided... her time was now.
While Vanessa was focused on driving, Wendy bent to grab the dictaphone and pretending to be busy searching for something under her seat, recorded:
"I'm bustier than my sister. Much bustier. Actually, I'm proudly stretching her bras with my superior bust!"
Wendy pressed stop... and felt a tingle in her bust. With the wind around her while Vanessa drove, she barely heard the sparkling sound. She looked down to feel her nipples hardening.
Yes! It's happening! she thought.
And indeed: seconds later, she felt her nipples pushing in her shirt. Forward. Followed by two tiny mounds of flesh, expanding with each passing second. She smiled as she eventually had enough to wear a bra for the first time in her life, but just giggled when she went on, and felt two firm B cups forming on her chest.
"What's so funny?" Vanessa frowned, looking at her.
"Oh, nothing Vanessa... I was just thinking that maybe it was my time to shine!"
Wendy felt a strange pride saying it, even more when Vanessa didn't even notice how Wendy was growing right there, and was now up to the size of the biggest girls of her class. Wendy had weird, flashing memories of her being quite popular. Just like the other girls able to fill C cups.
But then, she felt her breasts growing fuller. Heavier. Outgrowing even these girls. And her pride exploded with her bra size. Yes! Yes, she was finally big and growing bigger!
She wondered if she naturally loved this... or if this was part of her "proud" part of her record.
But who cared? Not her!
She knew she was already a D cup, with nice breasts slightly overfilling her hands on her chest, but she felt the urge to do something. She HAD to grab Vanessa's backpack on the backseat, and reached for something inside.
"Hey, what are you doing?!" Vanessa exclaimed, hands on the wheel and unable to stop her.
"I need... your bra!" Wendy exclaimed like it was a drug she was about to pick in there.
Before Vanessa could do anything, Wendy was already putting the thing under her own shirt, and with expert moves of a girl who just had to do it like her life was on the line, she managed to put it on, and felt her breasts fill more and more the too large cups.
"Not for long!" she giggled.
"Wendy, what the hell are you doing?!" Vanessa exclaimed.
"Trying your bras!" she laughed.
Vanessa was about to say there were too big...
When Wendy filled them entirely. She felt every inch of the cup around her huge breasts, and had flashing memories of being... a lot more than a F cup. Because she could fill her sister's bras despite being 1 foot shorter. Meaning in proportions, her tits were a LOT bigger.
Wendy realized this, and for a second, wondered if she went too far.
But then, she was assaulted by memories.
- Being the first of her class to sprout breasts
- Reaching a 26F only one year later, looking much bigger than even her teachers
- Growing on and being unable to hide her insane curves
- Boys going crazy, girls going jealous
And the best...
- Vanessa now known as "Huge Wendy's sister"
"Yeees!" Wendy groaned.
And felt even more pride when she felt her flesh overflowing the cups trying to contain her. Her shirt stretched to the max to the point every line of her bra, every curve of her overflowing flesh was visible.
"Take my bra off, you fucking monster!" Vanessa said.
"Shut up flattie!" laughed Wendy.
She ignored the pain of the bra straps digging in her skin as it became too small, way too small, her breasts expanding above, under, and on the side of the bra. Creaking sounds became loud enough for even Vanessa to hear them...
Before with a SNAP! the bra burst open, and fell on Wendy's stomach, while her huge, heavy breasts followed, slapping her just above her navel, before they stayed there, enormous, heavy, and yet, firm and sexy, with hard nipples denting the fabric of her shirt. Each one was way, way bigger than her head.
And Wendy remembered being in the second half of the alphabet now... and still growing.
And she loved every second of it.
"You can take back that puny thing!" Wendy said, dropping the broken bra on the car floor.
"Put your own bras own, Titties!" Vanessa exclaimed.
"Yes, I'll do that... but breaking yours was soooo much funnier!"
Vanessa shook her head: why did Wendy have to be so massive? And so proud of it?
She hated her...
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