Erika tried to ignore the swelling one-incher that was creeping up her panties, but all she could focus on was the nearby scent of Emily's crotch in heat. It was intoxicating, and each time Erika's friend brushed past, she would lean a little closer.
As Emily came close again, Erika took another whiff of her, closing her eyes for a second. All of the sudden a painful throb ran through her budding erection, and her hips bucked once, a surge of pre spurting out! Erika's eyes opened in panic, only in time to see herself accidentally slam against Emily. Both fell on the floor.
"Are you okay girls?" she heard the coach's voice utter from a distance.
Erika sat on her knees, her arms in front of her crotch, as Emily was on all four and rubbing the back of her head. There was a bit of blood on the floor, which Erika quickly realized came from her own nose after she had collided against Emily. The slight pain had not calmed down her arousal in the slightest, and her churning balls were swelling in her panties.
"I... I need to go... clean myself in the... bathroom", Erika tried to articulate as she looked at her shorts and noticed a darker stain seeping through.
She jumped on her feet to run before her classmates got too close, hunched over until she reached the privacy of the bathrooms. A line of sinks resting on a large counter and facing several toilet stalls.
Resting her hands on the counter, she rinsed the blood off her nose and looked at her own reflection in the large mirror. She was flustered and a bit feverish. Staring down, a small bulge tented her wet shorts. She pulled on the waistband to reveal her hardening penis probing under the little bow sewn on her panties, deforming them.
"Not again..." Erika whimpered. Her little member stirred more, pushing past the waistband. It still looked human for now, but the balls slowly filling the remaining space in her panties felt covered in fur.
"Erika, are you okay?" she heard as Emily pushed the door to come after her.
Quickly, Erika left her untucked shirt fall past her waistband to conceal her erection. For now it was tucked tightly against her lower belly...
Emily walked to Erika with a worried look on her face.
"Did I hurt you? I saw you were bleeding..." Emily asked. She looked about as flustered as Erika, who was hit again by the strong scent of heat coming off her friend.
"I... I'm ok, it stopped", she said in an uneasy voice, as her small erection oozed more pre all over itself underneath the loose hamp of her shirt. A musky smell came up to her nostrils. Emily didn't seem to notice or mind, but she came one step closer.
"I'm sorry for being so distracted, Erika... It's... Ever since my growth spurt, I've been feeling strange..." she began.
Erika gulped audibly. "Your... growth spurt..." she repeated slowly after her friend.
"Yes, you know..." Emily said. She lifted up her sport shirt and too small bralette at once, exposing round perky breasts. They had grown bigger since her selfie yesterday, and her small areolas were very puffy. Erika's balls started swelling in the confines of her tight underwear.
"But there is something else also..." Emily went on, blushing furiously. She pulled down on her uniform shorts and panties, letting them fall at her ankles and revealing a glistening groin. She must have been wet all morning long, because her panties looked soaked and she was visibly extremely wet. A tiny clitoris was poking out, engorged with blood. "I have a weird itch there and it won't go away, Erika..."
As Erika was staring at Emily's exposed crotch, fighting her raging boner, hypnotized, Emily stepped forward out of her shorts and leaned over, begging Erika with her eyes like a sad puppy.
Erika was already fondling with Emily's breasts before she even realized what was happening. Pushing her against the counter, she kissed her hungrily, bucking her hips against Emily's. Erika's growing erection started frotting her friends' clitoris, smearing pre all over the already moist area.
"E... Erika! There's something... something hard sticking out down there..." Emily whimpered in need, a little confused by her own tone. "It's... ah!" She let out a lewd moan, burrying her face in Erika's neck in shame.
Erika rubbed her hard member feverishly against Emily's groin, making her friend pant in need. Her penis started stirring, gaining another inch and a little girth. With the friction, it started tilting more forward and past her shirt.
"Fuck" Erika thought. She grabbed Emily and forcefully turned her around before her friend could look down to see her growing problem. Emily immediately pushed back, nesting her hips against Erika's, who started bucking unvoluntarily. Her hard-on slid under Emily's ass and against her wet sex from behind, provoking another lewd whimper from her friend.
"What's... what's happening to us..." Emily whispered under her breath, all the while frotting on Erika's swelling member.
"Do... do you want me... to stop?" Erika asked in a husky voice.
"Gn... no..." Emily moaned.
Erika rubbed herself harder against Emily, who was bent over the counter. Wrapping her trembling hand at the base of her small yet growing erection, she pushed to slide into Emily's folds. For a second she thought it would be too tight, but before she knew it the overly moist sex contracted around her to pull her in. Below, her churning balls were stretching her panties as they increased in size.
As Erika pulled back a little to slam forward once, then twice and more, her reddening cock stirred again, gaining a couple more inches and thickening. An irregular surge of pre was overflowing, and it lubricated its length as it grew.
"Aaah! It's... it feels big!" Emily moaned, her pelvic muscles contracting in pleasure all around Erika's fattening cock. Erika pulled down on her shorts and panties, releasing her heavy balls from the constraints of the underwear. She then gropped Emily's groin from behind with one hand and left boob with the other, pinching her nipple while she started rubbing her friends' engorged clitoris and slamming her now pointy dick as deep as she could.
Emily whimpered and moaned sheepishly, her hands clinging to the sink as Erika stimulated her from the outside and from the inside. Her vagina became animated by wild spasms.
"Erika, I..! GNH!" she let out in extasy as a wave of orgasms hit her. Erika felt her stimulated cock vibrates harder and fully develop inside Emily's petite body. Her balls felt massively inflated with cum.
"Is everything alright with you girls?" the two friends heard right outside the bathrooms.