During lunch, Emily kept squirming as she ate her plate quietly, squishing her soft one-incher and balls between her legs. She hoped her friends wouldn't notice.
She was still confused as to what had happened earlier when Erika had sat on her and the thing between her thighs had filled Erika's belly with goo. It was so embarassing, but it also felt so good! Since she had grown a boy dog thing between her legs, she had often felt extremely warm and excited, even after Erika's touch her had made her explode goo all over.
But after doing it inside Erika this time, Emily had discovered true relief and peace. Later on sitting in class, she kept blushing thinking back on it. When she tried not to think about doing "it" with Erika, looking at her friend would remind her of it all over again. 'Plus it's like she had discovered her friend in a new light since the changes. Erika and even the other girls smelled sooo good.
And Erika looked very pretty. Emily threw another side-glance at Erika's face, down the lines of her neck, to her chest, thinking about what they did earlier and what it felt like when their nipples brushed against one another's. She could almost see Erika's darker areola through the white fabric of her buttoned shirt right now!
Emily squirmed again on her chair, enjoying the pleasant thoughts and warmth returning between her leg - until the small thing in her panties started swelling.
"You okay Emily?" Erika asked. "Class is almost over."
Emily was breathing rapidly. "I... I think I need to go home soon..." Emily whimpered under her breath.
"Yeah, me too... My breasts kinda hurt," Erika said in a low voice, pressing her shirt against her chest to show her friend. They seemed... big.
Emily looked at Erika's barely contained breasts with wide eyes and her penis went rock hard, tenting her panties painfully. She jumped a little in surprised and pulled on the elastic of her underwear discretely to adjust herself, and her erection accidentally slipped out of one of the panties leg opening, wetting the inside of her left thigh with a bead of pre as it lifted itself.
The bell rang, and everybody in class packed their things. Emily stood up in slow motion, her now upward erection pressed against herself under the skirt.
"Erika... can we walk out the back today? I'm..." her voiced trailed.
Erika looked down and noticed Emily's skirt had a small tent in the front, which Emily promptly hid behind her schoolbag.
"Oh Emily... of course, anything to help you. After all, I know it's a little my fault..."
Emily shuffled behind Erika through the corridors, shuddering each time another student would bump into her. She was terrified of the swollen thing between her legs, but all the while extremely turned on. As Erika pushed one of the back door of the school to slip outside, Emily followed close and unvoluntarily humped Erika from behind, which sent delicious shivers up and down her spine. Erika didn't seem to notice.
The two friends reached the limit of the school ground. There was a stretch of somewhat unkept reclaimed plots with tree cover and bushes where they stopped to take a breathe.
"Phew, I don't think anybody noticed us", Erika let out with a sigh.
"Erika, what's wrong with your shirt?" Emily pointed with her small hand.
Erika looked down on her chest. The front of her shirt was wet, with two dark spots spreading. She unbuttoned the shirt in a hurry and opened it, revealing two heavy breasts resting on a somewhat swollen belly. Fluids were leaking down her nipple - milk! Below, several rows of canine teats pointed outward, following the curve of her body.
"Eek! This isn't supposed to happen like that!" Erika yelped in surprise, cupping the huge sensitive orbs in her hands. She gave a tentative squeeze, and milked spurted forcefully at a higher rate, splattering on the grassy floor.
"It's not stopping!" Erika panicked, trying to press her nipples into submission with no effect. "Help!" she cried out at Emily in despair.
Before Emily could think, she found herself pressed against Erika, her mouth wrapped around one of her nipples, and sucking on as much as she could. Erika let out a surprised moan but did not resist, a pleasant tingling running through her body as the pressure in her breast began to diminish. Her back to a tree, with a trembling hand, she grabbed her other breast and directed the nipple upwards until she could suck on it herself. The milk was sweet and almost intoxicating.
Erika felt herself light on her knees, and she guided Emily down to lay into the grass while they kept on milking her breasts. Emily pressed herself on top of Erika, sucking avidly while humping Erika's leg. Her wet erection was rubbing chaotically against Erika's thigh, pushing back on the skirt, until it slid up the leg opening of Erika's panties with a wet sound. The two girls tensed as Emily's member rubbed against Erika's clit and opening.
Their breathing became frantic as they both became even more turned on. Suddendly, Emily's tip slided and got caught inside Erika's opening, thrusting inside with a hunger. The two girls let out a lew moan, letting go of Erika's nipples for a moment. Emily felt the thing between her legs become even harder as waves of pleasures intensified within her. The sound of tearing fabric ripped through the air as Emily's member ripped both panties forcing its way deeper.
"I'm.. I'm sorry Erika! I can't... I can't control it..." Emily moaned as her hips rammed over and over into Erika.
"Don't stop... Don't... ah!" Erika yelped, as she felt Emily's member swell again inside her.
"What's happening?" Emily whimpered lewdly, as her member got hit by a growth spurt. Not only her knot explosively expanded inside Erika, locking herself in, but she felt herself getting squeezed harder inside Erika, as though there was less room than before. She was getting thicker and bigger!
"I think it's... it's the milk..." Erika panted between two moans. "It must be full of growth hormones!"
Emily felt the furry orbs between her legs getting heavier also, even as they pulled close to her body in preparation for what was about to happen. A rush of goo travelled through her length and gushed all around inside Erika as the two reached climax, howling in the bushes. The girls' hips bucked against each other as they moaned in the grass, their school clothes stained with a mixture of milk and dirt.
They laid still in the grass afterwards for many minutes, out of breath, until Emily's knot deflated enough to pull out. The thing between her legs slapped on her thighs with a disgusting wet noise as it went soft and more human-looking. It must have been at least six inches when hard, but was now down to a thick three. Emily went a little pale. Patting down herself, she also realized she had more curves than earlier, as though she had gotten bigger or older.
"Erika... something's wrong..." Emily started, but her voice trailed as she looked over Erika.
Erika's belly was swelling noticeably forward, pushing the shirt wide open and lowering the skirt's elastic band. She looked at least six months pregnant. The first row of teats under her breasts also started growing and taking shape, almost resembling a smaller set of breasts.