The door creaked open ever so quietly, but in the dead silence of the house it was like the crack of thunder.
The shadow filling the doorway visibly flinched at the noise, but there was nobody around to see his features illuminated by the flickering of the television. It was on some late night telemarketing crap. He’d fallen asleep on the couch, the volume muted so his ward for the evening wouldn’t be kept awake. Now, hours later, the babysitter had awoken in a cold sweat, and after a glance at the time, was now intent on one thing and one thing only. In the darkness, his fur took on the shifting colours of the television, surrounding his shadowy silhouette like a faintly glowing aura.
The teenage canine padded into the room as quietly as he could, his approach going unnoticed even as he kicked a toy here or there, stirring up noise in the muffled silence of the cub’s bedroom. His mind racing for excuses should he get caught, the dog breathed heavily through his nose, licking his lips as his heart pounded in anticipation. He let himself be guided by the bulge in his tight pants as he approached the soft, colourful altar upon which his prize slumbered. His prey.
In the dim light of the flickering television he could clearly make out the still, gently sleeping form of the boy he was being paid to look after. He was a soft, nerdy little squirrel with glasses and a slender, girly figure. He’d seen the boy around the neighbourhood before, so he had dreamed of this moment. But he still wasn’t ready for the sight of the helpless cub splayed across the bed like this, arms and legs akimbo. Already, he could see where the boy’s PJ’s had started to slip down from his tossing and turning, exposing his soft fur and the cartoon printed underwear beneath.
The dog took a deep breath to steady his nerves as he just stood there, admiring his boy, almost reluctant to disturb his carefree dreams. Almost. He licked his lips and quickly set about undressing himself, his belt jangling faintly as his jeans dropped to the floor, shuddering as he pulled his t-shirt over his head, rubbing his fur the wrong way before he discarded it on the boy’s toy-strewn floor as well. He was all too eager, wagging excitedly and panting softly as his hands moved to his bulging, stained briefs with some ceremony, taking his eyes off the boy for the moment as he peeled them off his already hard canine cock.
The large, angry red member bounced and flopped around in the cool air as he unhooked himself from the sweaty undies, before the familiar feeling of his paw wrapped around it and began idly stroking in all the right places. His gaze returned to the sleeping boy, and he grinned, a faint fapping sound echoing in the room as he stepped closer, wondering where he should start. His eyes soon fell on the boy’s mouth, hanging half open, and he grinned wider, carefully crouching down to lean one knee on the bed by the little squirrel’s head, heart pounding in his chest as he threw caution to the wind and dived in head first.
With one paw, he gently pulled the cub’s mouth open a little wider, and without hesitation slid his tip inside, struggling to hold back a gasp as his sensitive cock met the wet, warm and inviting flesh inside. It took all his strength not to just go buck wild and force his dick in deeper, rutting until he busted a nut. He snorted through his nose and took a moment to savour the sensation, before slowly beginning to hump the boy’s mouth, sliding his dick in and out, getting it all wet and slippery as his knot swelled dangerously. He had a good rhythm going, before he had to force himself to stop or he was afraid he might lose control. He would have loved to, dreaming of choking the brat on his dick, but he settled for just letting his tip tickle the back of the boy’s throat.
No, he had something else in mind, as he pulled his dick out with a wet pop. He quickly, and much more confidently now, walked around to the other end of the bed before climbing up on top, on his hands and knees above the helpless, oblivious little squirrel boy, thick, throbbing dog dick hovering forebodingly close to the boy’s rump. The dog carefully tugged those PJ pants down, gently bunching them up tightly around the boy’s knees as he repositioned the squirrel with his ass in the air. He paused for a moment, just long enough to tug off one of his socks, before pausing to pull off the other, slowly. Still, he managed to cause a few lazy giggles as he accidentally tickled the squirrel’s toes.
The dog smirked, before stuffing one sock in the cub’s open mouth, gently oozing saliva and pre, before he quickly used the other to tie it in place, gagging the boy. Panting in anticipation, he returned his attention to the boy’s undies, gently caressing his rump through the fabric for a moment before eagerly unwrapping them to expose those soft cheeks. He stared longingly at them as he tugged the colourful briefs down to his knees. Then he couldn’t stop himself from thrusting his face in and sniffing deeply, his nose buried between them as he snuffled about, letting his tongue explore the boy’s most tender areas, licking from his balls to the base of his big, bushy tail, held out of his far by one paw while his other groped and squeezed that delicate nutsack, tugging it this way and that as he rolled those balls around and jerked the cub’s willy. His ears flicked as he heard the boy release a few faint moans, his rump wriggling a little in response to the dog’s strong tongue buried in his ass.
He frowned when it seemed like the boy wasn’t getting hard, before something in him clicked, and the realisation that the little squirrel was too young to have had his first erection just turned the horny teen on even more. At that though, his eyes went wide and he pulled his muzzle out of the virgin ass, his heart beat booming in his ears as it pumped blood to his already engorged member, and he wasted no more time in mounting… his prey. He was screaming in his own mind to slow down, but couldn’t hear himself, no longer caring if the boy was lubed up or not, the bottle he’d brought with him lying forgotten in the pocket of his jeans as he felt his cock slide between those tight buns. He growled quietly in annoyance as he adjusted himself, missing and slipping a couple of times before he felt the sleeping cub’s tight tailhole line up against his tip.
Without hesitation he began to press forward, grunting and slowly increasing the pressure as the small cub’s tight, virgin ring proved too tight. But it wasn’t tight enough to stop him as he forced it in. He was so far gone that he didn’t even notice when the boy woke, panicked and frightened by the pain in his backside as the babysitter raped him. His squeals of terror and anguish at the discomfort of having his tailhole stretched violently to its limit by the older canine’s dick went unheeded as the teenager let his hormones take control, grunting and snarling as he swore aloud at how wonderfully tight the boy’s ass was, all while struggling to get his dick deeper with each buck of his hips. 
Eventually, he did notice the cub was awake from all the squirming that made his dick slip out of that tight hole, and had to snap out of it in order to hold the tiny body still, pinning his arms with one hand so he can shove it back in, much to the boy’s dismay as he found himself trapped in this nightmare. But the night was still young, and for all his efforts the dog was barely halfway in as he resumed fucking the cub, whispering so threateningly in his ears in the darkness that the little squirrel didn’t even recognise his voice. No matter how much the boy kicked and struggled, squealing in pain, that cock slipped deeper very, very slowly, the throbbing meat stretching out the little cub as his babysitter was intent on burying that knot inside him as his primal urges completely took over.
The knot eventually kissed the tyke’s sore, abused pucker, with each long pull of the cock in and out drawing agonised screams from him behind his sock gag as the big dog’s thrusts became erratic and frantic. His hips bucked fast one moment, and slow the next as he savoured every moment of that tight flesh, grunting and moaning deeply as he kept himself on the edge, a pang of disappointment sobering him up as he realised he was never going to get that knot inside the boy. That was the moment when he remembered the lube…
Slipping out with a wet slurp, the boy was too distraught and exhausted from the assault to even move, and sat trembling with his ass in the air, his tailhole gaping and oozing pre as the canine rummaged around in his clothes for the small bottle. He underestimated how much he was going to need, and frowned down at his engorged knot, red pointed cock twitching impatiently. He hastily uncapped it, dumping the contents onto his cock and slathering it up with both paws, paying particular attention to his knot, before settling back into position behind the squirrel and squeezing the rest of the bottle onto his abused ass. The sight of it gaping slightly sent shivers through the dog’s body as he tossed the empty bottle and worked the lube in with his fingers.
He was getting impatient, and his dick ached to be back inside that tight, warm hole, so he quickly obliged himself, ignoring the boy’s pleas for him to stop. The now slippery doggy dick went in much easier, sliding in smooth and tight against the pulsating walls of the little squirrel’s sore tailhole. He grunted in approval as he resumed fucking the boy, focussing on slow, steady strokes in and out, grinding the knot against the tight ring each time, trying to work his way in. If the boy knew what he was trying to do, he would have redoubled his efforts, but he was at a point where he wasn’t giving his attacker any resistance, which suited the dog just fine as he felt the boy’s ring slowly beginning to give.
The boy didn’t think anything could be worse than this. He was wrong, and when the dog finally managed to work enough lube in and forced his knot the rest of the way with a feral ferocity the boy’s screams through the gag were far worse, louder and more desperate as he resumed kicking and screaming, his body twitching and convulsing as he tried to get away from the sudden pain of his ass stretching around the massive lump of the knot. But that wasn’t the worst of it as the canine slipped over the edge, cumming hard inside the boy, driven over the edge by all the sudden squirming and tugging on his knot.
By the time he came back down to earth; the boy had passed out, his breathing ragged and exhausted.
And his eyes went wide as he heard a car pulling in to the driveway…
“Fuck!”