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After living with Kyra for a few semesters, Trish thought she was used to the delicate aroma that her girlfriend gave off when she was in estrus.

When her heat cycle lined up with the warmer months of the summer, however, the vixen was beside herself: she already had trouble resisting Kyra's wiles when she wasn't being assaulted with the intoxicating scent of her pheromones, but when they were in full force, Trish couldn't help dropping to her knees and going in for a taste straight from the source.

"Is she always this aggressive with you, sis?"

The fact that Timo was over for the afternoon was making matters worse for Kyra, no doubt. Her longstanding relationship with her brother was one that crossed the incestuous line so often, the taboo of the act was almost lost on them...but he was an impressive physical specimen.

Just because he was her brother didn't rule him out from the pool of potential mates, and as far as her heated body was concerned, a tall, handsome husky was just the person she needed to bed to make sure her cycle didn't go to waste.

"We like to go back and forth with each other," Kyra did her best to explain, but with Trish pushing the warm, ticklish end of her muzzle right up into the husky's mound, chatting so casually with her brother became nigh impossible. "Something about this time of the month makes her...r-ravenous, though..."

Already, the silver vixen was clenching tight around the back of Kyra's thighs, making sure the husky wouldn't pull her womanhood away until she had her fill. It was nothing short of sexual greed, but for the pleasure she felt on the other end, Kyra was more than happy to oblige her lover.

The idea that her brother was watching the action all the while was a welcome bonus, but Kyra knew he wouldn't be able to sit on the sidelines much longer; she wasn't at all surprised when he knelt down behind Trish and lifted the base of her tail, pressing the tip of his member against her rump and gliding it down toward her own soaking folds.

"You think we should try and cool her off, sis?"

Timo winked up at his sister and saw the devious twinkle in her eyes when she caught up to his same page. "Sounds like a d-damn fine idea to me," she agreed, struggling with the bliss that laced her every word. "But when you're done drowning her flames...maybe y-you...c-come help me with mine, Timo?"

It wouldn't be the first time that Kyra went to her brother in a sense of heated desperation. Their sex life was already active enough outside of her estrus, but they both knew the greater risks involved at that time of the month.

Timo was only mortal, however, and just as beholden to his instincts as any other male canine. Even as his length was tickling against Trish's cunt, he could just glean the scent of Kyra's, as if the pheromones were reaching out to his nostrils and tugging him closer to that warm, tender entrance.

"Are you gonna make me hold back?" he asked, pushing her buttons with a teasing grin.

"Please don't ," she begged, needing him to give it his all if she was going to feel genuine satisfaction: her heat demanded his absolute greatest effort. "Give Trish a drink if you're going to, but then...g-get over here and give me that fucking cock!"

"Just make sure that you give her one, too..."

Kyra's mound was already soaked with the glisten of arousal from her own petals, and Trish was doing her best to add a little extra fluid to the mix as she slipped her tongue between those pouted, tender folds.

There was still one kind of juice that she was patiently waiting on, and when Kyra flashed her another grin, Trish knew better than to slurp: she needed to swallow.

"After the amount of work that she's put in, I'm sure she's just parched...you really think I'd let her go without giving her a little bit of her favorite flavor?"

Giggling into the warmth of Kyra's womanhood, Trish stayed still, pressing the flat of her tongue against a tender slit. She looked up with bright, eager eyes and waited, knowing that the salty-sweet warmth would be pouring over her tongue before long.

She didn't expect to feel it against her own sex, however, before she felt it pouring into the back of her mouth: Kyra's heat was so influencing that it made her forget all about the full, hefty cock that was pressing against her own entrance.

"You can be a bit of a tease," Timo pointed out. "I wouldn't put it past you to make her wait a little longer for it..."

"Not to sound selfish," Kyra sucked in a gasp as Trish suckled at her clit, gathering the spilled offering in her mouth and letting the warmth wash back over the husky's nub, "But right now... I'm the one who c-can't wait any longer!"

The pressure to mark her lovers as her own was never greater than when Kyra felt the weight of her estrus on the back of her mind. Instinct ordered her to release everything that she'd saved onto Trish, and the vixen did an admirable job keeping up with the flow...but there was a pleasure beyond the carnal delight, in seeing the excess spill over her lower lip and down the front of her neck.

Trish wore the golden stream quite well, and as it trickled down through the valley of her cleavage and spilled across her torso, that intimate warmth reached and joined with another puddle, coming straight from the husky behind her.

"I didn't know you had this much to give," Timo murmured, able to feel something trickling back onto his own shaft...but it wasn't Trish giving that offering.

Kyra's pee was dribbling all the way down, soaking Trish completely in the front until the last of her mess splashed down on Timo's length, all while he emptied his own bladder against Trish...but the vixen finally joined in on the fun when she felt her inner workings relax.

Timo was only faintly penetrating her folds when she allowed her stream to trickle back over his cock, gracing it with a warm, fluid pleasure that couldn't be achieved through any other means. All three members of the pack were sharing relief as much as they were sharing delight, and when Timo was finally drained, he left the tip of his long, thick member inside of the lucky vixen, letting her feel that extra bit of bliss while she soaked his lap.

For as long as she could, she wanted to feel that tapered, canine cock inside of her; she knew that Kyra would be hogging it as soon as she was done relieving herself, and with the poor girl suffering from such a powerful heat, Trish was doing her best to be a comforting and accommodating lover.

"Mnn..._nnf..._f-fuck...I've got him a-all warmed up for you, love," Trish finally spoke up to Kyra, as she swallowed the last, faint dribbles of the golden fluid, drinking the source dry. "Just how many rounds do you think it'll take before you feel satisfied?"

Kyra didn't need to think about it: one time wouldn't be enough to handle the intensity of her current heat, and two times would only just start to scratch the itch.

Before the day was done, Trish and Timo were likely to be taking turns penetrating the lucky husky...Trish was quite looking forward to getting a good workout in with her strap-on.

"Let's just get that first one out of the way," Kyra finally answered, as she gave her brother an absolutely demanding look. "And then I'll let you know how I'm feeling..."

They always made sure to play in the kitchen or the bathroom, to make it easier to clean up the mess when they were done; tiles cleaned up a lot easier than carpet did, especially when all three parties involved were letting go of quite the hefty load of urine.

This time, they picked the bathroom for a very specific reason.

"Your knees nice and comfortable, sis? I'm not gonna go easy on you this time.

"I told you not to."

The padded mat in the bathroom made a perfect place for Kyra to make herself comfortable. She was planning on being down on her knees for quite a long time, allowing her brother and her mate to take turns until they were exhausted...and if that still wasn't enough, there was a vibrator on hand to finally quell her heat into submission.

The first round was always the stuff of Kyra's deepest fantasies, and Trish was laying right next to them in the puddle that they'd made before. She had a perfect view of Timo kneeling behind his sister for the mount, and she was licking her lips as she watched the delicious, tapered tip of his cock penetrate Kyra's slicked folds.

Probing and feeling for the right spot was the only thing that Timo did gently for the rest of the afternoon.

"I think you forgot who you're dealing with here," Timo murmured, as the tip of his rod kept her petals spread open for Trish to enjoy. "No one fucks you harder than I do, Kyra..."

"Shut your mouth and prove it already!"

Teasing a heated canine was a surefire way to get them riled up at you, but Timo wasn't afraid of his sister's wrath. If anything, he was grinning wider when his hips finally crashed into her lifted backside...but when he looked for the shock in her expression, he was met with a look of even greater sexual frustration.

"...Is that all, Timo?"

The girls were snickering back at the larger husky, knowing that they'd be able to milk out his best performance with a tease of their own. Trish was already snaking a paw between his legs to give his balls a tender stroke, but keeping her digits against the sensitive flesh was difficult when he gave Kyra another sample of what she was after.

They became the very image of lustful canines when Timo leaned the rest of the way over and mounted Kyra properly, wrapping his arms around her tummy and dragging his claws through her fur until paws came to rest against the top of her thighs. She wasn't going to get away from him until he had his fill, but she was simply hoping that his fill would be enough for her , too.

Since she started dating Trish, she felt that her heat cycles were going on longer and longer, with stronger urges to be satiated; a few rapid thrusts just didn't do the trick for her anymore.

Even though Timo was the one on top, Kyra was the one in control. She made her point as she braced her paws against the tiles and threw her hips back ferociously, slamming into Timo with such force that she nearly knocked the wind from his lungs; she was thrilled to feel another thrust in retaliation, knowing that her brother was able to take a beating and keep going for her.

"I don't think I've ever seen her this wet before," Trish commented, keeping her face right under the middle of the action. She couldn't keep her tongue to herself, as she pressed it up against the hood of Kyra's clit, and with every thrust from Timo's aggressive charge, she allowed his driving cock to mold her tongue against Kyra, so no two lashes of the warm, sopping muscle would feel the same. "I dunno what you do to her when I'm not around, Timo...but keep fucking doing it!"

There were few barriers left between Timo and Kyra: the incestuous one fell when they were much younger, and shortly after that, they found a similar enjoyment in their fetishes, as well. It only made sense that they'd keep exploring different things together, but that afternoon, they were going to do something that went a step beyond their normal taboo.

With Kyra throwing herself back at his lap with everything she had, and Trish fondling his sack at the deepest part of his every thrust, Timo wouldn't be able to last as long as he hoped. Every single thrust he gave was laced with more pleasure than the one before it, and Kyra's inner walls were already starting to clench with the weight of her first orgasm, but the male husky was determined to see if he could give his sister another, before his first arrived.

He knew he needed to pull out before he got too close, but when Kyra looked back at him with begging, pleading eyes, he couldn't resist giving everything he had left to his final thrusts.

"That's a...a lot of precum, Timo," Kyra muttered breathlessly, doing her best to speak between the hammering pumps of her brother's hips. "Might wanna...pull it out soon...mnnf!"

There was no point in keeping score for Kyra, who knew that she'd be run through a gauntlet of orgasms before the evening came to a close. The first one was rather subtle compared to what she'd expected, but it was running right into another...and the hint of relief that came with such a quickly following climax kept her from pushing Timo away.

It was up to her brother, hypnotized by the air of lust that she gave off, to do the right thing and pull out before it was too late.

Resisting her wiles proved nigh impossible by itself, but as Timo continued driving into Kyra and unleashing every ounce of energy he had into her needy womanhood, there came one more source of temptation: Trish shifted the weight of her tongue down Timo's shaft to taste Kyra's natural juices, and ended up twirling the warm, pliable flesh around his orbs, giving them one last layer of encouragement to empty inside of the fertile husky.

Slamming into his own sister with feral speed and deep, heavy grunts, Timo completely abandoned responsibility and let the first rope of his cum fly within Kyra's well-fucked passage. Seed gushed across clenching, fluttering walls, but in her overwhelming lust, she didn't panic in the way that she should have.

What came first was an eager roll of the eyes and a slump of her face to the cool, soothing tiles as yet another length of his yield spilled inside of her. Already, it was racing up to her womb, but before she could convince her brother to sneak out of her body...Trish took things into her own paws.

Feeling the weight of Timo's knot in her grasp, Trish gave the husky a firm swat on the ass...and as his hips leapt forward again, the thick, fleshy lump popped inside of Kyra with a sound and presence that was utterly delightful...but only when they heard the quiet schlip of it sealing Timo's cum inside of Kyra did all three of them realize the terrible mistake they'd made.

"Oh...o-oh fuck!" Timo yelled out, trying to yank his hips back; it was already too late for him to move. His knot was completely buried in his sister, right in the middle of her heat cycle...and trying to separate himself from her body early would risk a terrible injury to both of them.

As Trish blinked of her own trance of arousal, she looked on the sight and gasped quietly, bringing her paw to her muzzle. "Timo, you...you weren't supposed to do that!"

Kyra was still too busy navigating a river of physical ecstasy to look back at her brother with anything less than lewd desire, but at the very pit of her iris was a drop of panic, telling the story of how she'd feel when they were finally able to pull their bodies apart.

Her pleasure was extended and enhanced by every throb of the knot in her passage, but with each one, she felt another small, warm jet of cum joining an already impressive load in her womanhood, spilling down to her fertile womb...

**

The rest of the evening didn't play out as the trio had hoped. There was still plenty of arousal to go around between them, but with the aura of nerves that had joined the mix, none of them were in the mood that they originally were.

Nice as it would have been to keep trying to soothe her heat, Kyra didn't know if she could let Timo back inside for another round, and for his part, he didn't trust himself to put his cock to any use without losing another load inside of her at such a risky time.

The weeks that followed were equally tense, and naturally, Timo was checking in on Kyra constantly, making absolutely sure that there were no changes. At their dorm, Trish was taking the best care of her lover that she could, but there was only so much she could do to keep Kyra from going into a daily panic.

They were lucky that it was the middle of the summer, rather than the middle of the semester.

It wasn't until a couple of weeks later that Kyra finally emerged from the bathroom with a tired, but relieved smile on her face. Trish knew what it meant the moment she came back into their living room, but when she did, she was met immediately with a tight embrace from both members of her pack.

"You got damn lucky," she murmured, giving both of them a look: Timo was the one who let his seed spill inside of her first, but Trish encouraged him to keep going and make matters even worse. "But I think I'm ready to forgive the two of you, if you're ready to start...apologizing?"

They'd all gone the entire gap without playing with each other at all, finding themselves too nervous to enjoy each other's company in an intimate sense since the scare. Now that it was over and done with, however...

"Follow me to the shower, you two. I'm sure you can find a way to make it up to me."