Tomorrow is a major day for cheerleader Allie Summers. There will be a college scout looking to give away a scholarship to the best cheerleader, but the last three years he picked a blonde with HUGE breasts. Allie is practicing her cheer in front of the mirror, but she's having a hard time with her pep as she watches her little A cups bounce when she jumps.
Allie's step-brother walks in and scolds her for being loud, "you'll wake up step-mom and step-dad," he tells her. She apologizes as her eyes are lowered to the floor, she's not in her usual sarcastic mood and step-brother prods her on what's going on. He feels sorry for her predicament and offers her a potion to make her dreams come true. Allie laughs at him, she's not the superstitious sort, but when he shows her the glowing red liquid her eyes light up with hope. "It might work? I could give it a shot. I've got nothing to lose." She swallows it and... nothing. She tells her step-brother to get out of her room, thinking he is pranking her, but as he leaves he hears a noise similar to a stomach gurgle. He stops and turns around, her breasts are growing!
She watches in awe as her breasts fill from barely an A cup to a B, then to a C! She touches her sensitive breasts over her cheerleader top. Allie gushes in gratitude, "how will I ever repay you?" Her opportunistic step-brother reaches his hand out to touch her full breasts and she slaps his hand. "Hey!" He furrows his brow and gets a little more aggressive with her, he grabs her breast and squeezes. "Ouch!" Allie slaps him and orders him to leave. She grumbles a bit, and then explores more and more of her breasts. She doesn't realize that her pussy is getting wetter and wetter, her clit begins to become engorged, it grows, it grows longer and thicker as it breaks through the cotton fabric. She watches with wide eyes as her clit grows strong and dribbles cum, she touches the shaft, hesitantly at first, and the more she touches herself the more pleasure she feels, she strokes more, and more, fingering her little pussy with one hand and stroking with the other, she explores her new body until she builds up to an eruption. She cums ropes and ropes of cum all over her bedroom mirror. She hears her step-brother storming down the hall, he probably heard her moan, she throws her cheerleader jacket over her lap.
Allie has a brand new testosterone running through her body, her clit is throbbing, begging to cum again. She sees her step-brother and throws him on the bed. She his shorts off and peels down his underwear. "It's time you learn a lesson," she grits her teeth as she fucks him. The feeling of his tight sphincter hugging her shaft makes her head fall back in pleasure. She thrusts in and out as he lay paralyzed in fear and pleasure. She pulls out when she is about to cum. "You're no longer my step-brother, you're my cum slut," a wicked smile forms as she slaps his sore ass.