Sam whispered in Cole's ear as they frotted together in the near-darkness of the closet, their lower body only outlined by the weak flashlight of a phone on the floor: "How about you return the favour from the other day, and eat up my clit?" she grinned.
Cole's glanced down at Sam's feminine yet very erect four inches, which made him blush and salivate at the same time.
"Y-yes, anything for you," he said in a voice trembling with anticipation. It was hard for him to hide how much this turned him on - the novelty of touching another person, being touched, not to mention with someone he knew only as male not so long ago. The simple feeling of another person's hard-on against his own already had him throb and leak pre all over.
He kneeled in front of Sam, timidly grabbing her erection to lick its length. She closed her eyes when she felt him breathe on her girl dick, and savored the warmth of his tongue over her. She opened the front of her buttoned school shirt a little wider and her small breasts peaked out of her boy's uniform, along with six swollen dog teats, giving Cole an exciting view from below.
"That's a good boy", she praised him, caressing his head as he went on. Cole's heart jumped when he heard the words and he wrapped his lips around her length with renewed enthusiasm. Sam moaned softly, absent-mindedly caressing her tender breasts - they were small again now she was empty of milk, and so sensitive.
Cole watched her as he sucked on her, and as he got more and more excited, his own erection brushed against Sam's knee. A jolt of pleasure ran through his groin and he pressed himself against her, humping her leg.
"Take your time, big boy" Sam giggled. But she could see him losing control - if he had any at all to begin with - and she really enjoyed that.
Cole grunted with his mouth full of cock as his hips started bucking out of control. Sam's cock escaped his mouth and he pressed his face against it, losing himself in the moment. His swollen canine knot rubbed against Sam's leg a few more times and his churning balls released their load. He let out a whimper, humping Sam's leg feverishly as cum exploded against the bottom of her pants and between her shoes.
Sam held Cole's head against her wet dick as he came, her pre smeared over his face. "Don't think we're finished here, pup" she teased him as he was struggling to catch his breath. Cole's hips contracted unvoluntarily again and more canine seed splattered under him, until the spasms that animated his member weakened and ceased. Cum was still oozing out; he was making quite a mess there.
The janitor closet's door cracked open slightly, Erika's silhouette appearing against the bright light of the corridor. Cole shuddered, caught like a deer in headlights, but Sam grabbed his head firmly to keep him down on his knees.
"I knew you would find a way to be naughty again the second I turn my back", Erika sighed. She let herself into the closet, and ordered Emily behind her: "Keep watch outside and don't let anyone else in, ok?"
The door shut behind and she walked over an empty bucket to close the short distance between her and the two squirming teenagers. Looking down in the low light, the wet stains on the floor and over the bottom of Sam's school pants were unmistakable, not to mention they still had their cocks out in the open, threads of fluids glistening in the phone's light. Sam's delicate, still human erection contrasted with Cole's brutish canine rocket, which was almost twice the size.
Between Erika's legs, her own returning canine appendage stirred at the sight. The swelling inch of flesh turned into two, and more soon - not to mention her ballsack filling her girly underwear.
"I think someone needs another lesson from the real alpha here," Erika smirked, already lifting her skirt to pull down on her panties. Cole and Sam let out a soft whimper, yet their cocks both throbbed in anticipation.