Max groaned, gritted his teeth, and sank forward again, and again, and again, each thrust sending a sweet pulse of unbelievable sensation ricocheting through his lower body. His fingers curled within short fur, gripping at the shapes of taut muscle and tight bone underneath; his heart pounded in his chest, his breath caught in his throat, and in the spaces in between the squelching slurps of his thrusts into the plump, wet canine spade, tugging out around him each time he pulled out, squishing back in on itself when he pressed back in, all he could hear was the fervent, excited panting of the other dog underneath him.

Her tail wagged against his belly, occasionally flipping free, swinging to the side, and smacking back against him only to again flick across the other way. He drew out again so that only his tapered tip remained inside; looked down at the way the thick slickness coated his shaft, the way the lips of her sex bulged out around him, how they pinched inwards, and again, with her urgent clenching; how her tight, puckered tailhole did the same as well, the overlapping folds of flesh tugging up beneath the base of her tail. Sometimes he liked to wrap his paw around that spot where her tail met her body, and he would squeeze there, tug upwards to feel the extra tension in the skin and flesh, then press himself all the way back in, past the slight bulge where his knot had yet to fully swell.

The way she squeezed around him each time he did this, succulent interior meat slurping along his buried shaft, the warmth of her arousal dripping down along the front of his sack, the way that slick moisture had matted down the fur of his thighs… the wild dog shuddered, swallowed, and adjusted his hips again, this time pulling just far enough back for his unswollen knot to slide free, then pressed in again.

From deep inside he felt the urgency simmer, grow, and then finally flare up. Again he gritted his teeth, bending more fully over the other canine, gripping her haunches, tugging her back against him as he thrust forward, balls swinging underneath her, hips pumping against her rump. She clenched around him, panted, wagged; Max closed his eyes, tilted his head back, sucked in a breath through those clenched teeth, then jerked, jerked again-

-and couldn’t help but moan out when the finish finally pounded through him, like a wad of energy balling up inside and then suddenly exploding out. His claws dug into the soft skin beneath her fur, his full shaft throbbed and twitched inside of her as he dumped deep inside, adding his own pulsing, spurting heat. For a moment he actually felt dizzy, and had to rest his weight against the rump pushing sweetly back against him, the tail still trying to wag against his belly, the plush, pillowy spade wet with saliva and arousal sucking in against the lip of his sheath; Max swallowed again, cleared his throat, shifted his paws back, moved to tug free… and jerked forward all over again at the sunburst of sensation squeezing along the back of his now fully-swollen knot, tied inside.

His chest heaved. Still the remnant delight swirled through him, making his fingers tingle, his tail wag, his legs tremble as he tried to move and readjust. This next part still embarrassed him a little bit: despite seeing it in videos plenty of times, Max himself had only done it once, and that was at Erika’s insistent urging – and the result had forced him through a second finish immediately after the first. So, heart thumping, entire body shaking, he swallowed again, braced his paws against the canine rump underneath him, and began moving to swing one leg over the other’s body.

The tug began down in the root of his sheath, then pull up, and out, and back as he turned himself around. Immediately those same sensations began to pulse through him again, his balls rolling off to the side to hang limp along the base of his shaft, the supple, sex-wet skin of his sheath slipping back… his knot twitching where it was still tied deep within warm, plush slickness, each forceful pulse causing it to nudge outwards against the walls squeezing around it all over again. Max ground his teeth together, felt a string of drool drip from the corner of his mouth, for a moment thought he briefly blacked out under the overwhelming hypersensitivity and the delicious sharpness echoing through his loins – and then his knee hit the carpeted floor of the bedroom again, and he felt the tie fully settle in and pull, and then suddenly his chest was against the floor, his muzzle was sideways, his own tail was wagging against the other’s, and-

-and Erika sprawled out in front of him, paw working smoothly between her legs at her own plump, wet spade, fingers glistening with sticky wetness. She knew what she was doing, of course: Max’s nose twitched with her rich, intoxicating scent, so similar to what he wore along his upper lip and had smeared across his nose, his fingers, his sheath, and his shaft, as Mara panted and tugged at their tie behind him. The feral dog still wagged her tail where she stood, posture rigid, rump grinding against Max’s, the pace of her breathing adding an extra, rhythmic pull to his already overwhelmed senses.

His sister smirked, tilted her head, and reached in – with the paw that had just plunged between the folds of her spade – to tilt his muzzle up to her. “So? Didja cum again?”

“No,” Max groaned. Then he got another, richer whiff of her scent, felt Mara squeeze around him again – and the next thing he knew, his claws had dug their way into the fibers of the carpet, his shoulders had pulled back, and he was yanking fiercely down from inside the feral dog’s sex wrapped snug around the root of his knot. His eyes wrenched shut, his lips curled back, his jaw clenched until he felt his teeth grind all over again, and there was that bright, intense pressure and pleasure all over again, thrumming through his body, pulling his muscles like bowstrings, and then lingering even afterwards, like the scent of smoke after a fire.

After another moment he finally let his breath back out. “…Yes.”

“Good boy,” Erika purred. She patted the side of his muzzle, then turned her paw, teased those wet fingers against his lips… slid two of them in. “We’ll get you nice and trained. You’re gonna be stuck there for the next… eighteen minutes? Is how long it took last time? But, good news for me…” And she spread her legs and scooted forward, the heft black meat of her protruding spade bouncing. “Your mouth is still free for that time. Whaddya say?”