Clap BE

Cynthia was at a track meet with her best friend Christie. They were outside warming up on the school's practice fields when they saw a box. Cynthia jogged over to it, picked it up, and examined it. There was no address on it, just the words "you're welcome". Cynthia clutched it under her arms and they ran back to the track.

Cynthia was one of the hottest girls in the school. She had curly long brunette hair, with a nice smile and a pretty face. She had a slim waist, wide hips, and a toned stomach. Her ass was pretty big, and she had long, slender legs. The only problem she had with her appearance, was her A cup breasts. She had always been self-conscious of them and envied Christie, who had solid C cups.

Cynthia was curious about the box, so she took it to the bathroom in the school and opened it. Inside she found a rock with a note attached. It said "Wishing Rock: Hold it in your hand a make a wish. Warning! ONE wish per person."

When Cynthia finished reading this she started clapping joyously and immediately knew what to wish for. She closed her eyes and made her wish. When she finished she looked down at her breasts with anticipation. After several minutes she gave up hoping after she realized it was probably just a joke.

Christie then entered the bathroom and saw Cynthia. "What's wrong?" Christie replied.

"Oh it's just this rock. I thought it was a wishing rock and made a wish and got too caught up in my fantasies to think it was fake" Cynthia said.

"A wishing rock?" said Christie. "Let me see." and Cynthia handed her the rock.

Christie closed her eyes and made a wish and instantly her breasts began to grow. They grew and stretched her bra and shirt to their limits before stopping at DD cups.

"How did you do that??" said Cynthia jealously.

"I made a wish silly" mocked Christie.

"But i wished for the same thing and my wish didn't come true" said Cynthia sadly.

"Oh well" said Christie, smiling and groping her breasts. Cynthia was angrily looking at Christie when she heard the sound of claps coming from the track outside. She dismissed it at first, but then noticed that her sports bra felt a little tighter. She looked down, took off her shirt and messed with the straps. The clapping continued and her bra got more and more uncomfortable. She finally just took it off to alleviate the pressure.

She was shocked when she felt her boobs bounce out of their confinement. Her boobs had never bounced before and this was startling. She felt them settle down and stop moving, but felt an odd sensation. Her breasts were still moving outwards. They were growing!

She gasped as her now B cup breasts continued to grow and jiggle as the clapping outside continued and only seemed to intensify, and so did the pleasure she felt from the growth.

"Oh my God! What's happening?!" Christie exclaimed.

"I don't know!" replied Cynthia. "I guess I was clapping when I made my wish so every time I hear a clap, my breasts grow" she managed to say between moans.

"But that's not fair!" said a jealous Christie, who was now attempting to make another wish. "It's not working" she said.

"Yeah you only get one wish" said Cynthia smiling, half out of pleasure and half out of her friend's jealousy. "Oh well" she said as her boobs continued to grow. They now surpassed C cups and were pushing through the D range. Cynthia loved this so much and started groping her nude breasts as the clapping outside stopped as the race ended. Her breasts stopped growing at around a full E cup and Cynthia was smiling from ear to ear.

Christie was staring at her breasts angrily and then had a sly grin. She clapped her hands together one time. A jolt of pleasure washed through Cynthia as her breasts grew a little more.

"Wait what are you doing?" Cynthia asked her friend cautiously.

"Oh nothing, just helping your wish come true" she said, still smiling. She continued clapping and got louder and faster. Soon Cynthia's breasts were passed F cups and still growing. The pleasure continued to hit Cynthia as she lost her balance and fell over onto her breasts and started teasing her pussy through her shorts. Her breasts were now mid H cup and Christie stopped clapping.

"There, that's better. Good luck competing in your race without tipping over. I don't think you wished for your back muscles to adapt did you?" she said sarcastically. "Oh well" she said laughing as she left her "friend" on the bathroom floor.