Sarah grinned. For a brief moment, she turned away from the others and muttered quietly so nobody else would hear her use the wishing stone, "I wish David's friend would come over to talk to us and grab David's butt."
Immediately, David's friend turned on the spot and jogged over to the group of girls. Casually he slapped his David's attractive feminine rear and said, "Hey buddy, whassup? Nice thong man, it really brings out the colour of your cheeks!"
"Haha, thanks dude," David was proud of his ass and liked when people noticed it. "Cheeks, hehe... Funny stuff man!"
"So are you going to introduce me to your lady friends or what?" The newcomer looked the beach bunnies up an down appreciatively, which annoyed Sarah somewhat.
"Oh yeah, sure," David answered, nervously aware that his friends hand was still attached to his butt and gently squeezing it. "Jennifer, Sarah, Karyn, this is my friend Wallace."
"Hi Wallace!" Jennifer waved enthusiastically.
"Charmed ladies, I'm sure," Wallace took Jennifer's hand and shook it, while he caught a good look at her impressive cleavage.
Sarah noticed this and immediately got hot under the collar. "Hey, Wallace!"
"Yes?" Wallace turned to face Sarah, but didn't elevate his gaze quickly enough.
"My face is up here," Sarah snapped.
"Oh, I'm sorry," Wallace pulled his eyes away from Sarah's rack to look at her face.
"You will be," she muttered and turned her back on him.
Clasping the stone to in her fist, she whispered, "I wish that Wallace had big breasts just like Jennifer's... except three cup sizes larger! Yeah! And I wish he was wearing a feminine bikini that was just too small in the bust for him!"
"Hey, I'm really sorry," Wallace began, then paused as he began to feel a little dizzy.
Sarah turned back to see his swimming shorts had transformed into a frilly two-piece string bikini with a love heart print. It was too baggy for his chest and left his nipples exposed, which were much larger than any man's should be. Fatty tissue began to pool under his nipples and his chest swelled into two distinct mounds. Female breasts quickly inflated on his chest and by the time they had reached the size of Karyn's and Sarah's bust they showed no signs of slowing down. They were Jennifer's own size now, and snugly filling the bikini. Still they grew, stretching the bikini as they bulged out of their confines and overflowed the edges of the cups.
The growth ended as suddenly as it had begun and Wallace stood there in silent shock, until new memories flooded into his brain and suddenly his tits were the same ones he'd been growing up with since he'd hit puberty.
"Wow Wallace, your boobies are so huge!" Jennifer said admiringly. "How did you manage that?"
"Is it a special diet?" Karyn chipped in. "I heard some foods can make them grow bigger if you eat enough of them!"
"Thanks for the compliment," Wallace laughed, which caused his tremendous to quiver excitedly. "But no, it's all in the genes I'm afraid!"
"Aww, come on!" Jennifer pleaded. "There has to be something you eat that helped you get them to that size! Tell me please? Id' love boobies as big as yours!"
"I don't know," Wallace said, slightly embarrassed.
"You drink a lot of milk, don't y-eeeee!" David began, before his friend groped his butt strongly.
"Shut up dude, I do not!" Wallace hissed.
"Milk, huh?" Jennifer said thoughtfully. She grinned and added with determination, "Well then, I'm gonna drink lotsa milk every day, until I'm as big and bouncy as you are Wallace!"
Sarah was stunned by the size of Wallace's new boobs. Even on his tall frame they look big, and the tight bikini top exaggerated them even more. She estimated he must be a G or H cup now, depending on Jennifer's measurements - possibly even bigger! What was even better was if nobody heard her make the wish, there was no way she'd be caught! While the others chatted and flirted and laughed, Sarah smiled and listened and began to think about what other fun she could have with her wishing stone...