When In Heat, Don't Fuck Your Brother
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** This is a work of fiction. Events in the story are not meant to be taken seriously. If you are offended in any way, I apologize, as that was not my intent. I am merely trying to write a decent story. **
Diane's first heat wasn't anything like she expected. She was told to expect increased sensitivity. Yeah, there was that. She was also told to expect the urge to stick anything and everything inside her to sate her lust. Okay, there was that too. But she had expected it to be fairly mild, something she could easily control. The reality was something much different.
"Why won't it stop?" the German Shepherdess moaned, rubbing her inflamed vulva against her bedpost. No matter how much she rubbed or fingered herself, the insistent itch returned almost as soon as it had faded. Diane's mother was so worried about the effect her daughter's first heat might have that she insisted that her husband and stepson stay in a hotel until it was over, just to be safe.
With an annoyed growl, the Shepherdess flopped back onto her bed, fingers shlicking at her pussy. Because of her heat, her mother had kindly given her some time... alone... in the hopes that she could ease it. But no matter what she did, the fire returned, worse than before. Groaning in defeat, the canine peeked behind her bedroom curtains to glance out the window.
Diane's room was near the front of the house, and had a clear view of the front yard and street. Being mid-January, and below freezing, the street was nearly empty, save for one lone figure walking down the sidewalk. What could anyone be doing willingly out in this cold? she wondered to herself before shivering, her one hand not having ceased its fingering.
Before she could wonder much more, she realized the figure had stopped in front of her house and was opening the gate. "What the --" Diane removed her fingers and slipped off the bed, barely remembering to grab a robe off the back of her door before walking out into the hallway. She reached the front door just as it swung open, revealing the tall, slender figure of her step-brother, Spencer.
For several long moments her step-brother just stood there, letting in cold air. It was then that Diane realized she had forgotten to close her robe, leaving her breasts and slit exposed to the cold air. She felt her nipples harden in response to the sudden change in temperature.
"Uh... Di?" The Shepherdess blinked, coming to the awareness that she had pressed her nearly-nude body against the tiger's, grinding her breasts and pussy against his clothed body. Embarrassed, she stumbled backwards, pulling the robe closed around her body. "S-sorry, Spence," she stuttered.
"It's... it's fine," the tiger muttered, his nostrils flaring as he picked up the Shepherdess' scent. The tiger removed his coat and hung it on the back of the front door. He shifted uncomfortably, an obvious bulge growing in his pants as her scent grew stronger. "I, uh, I came to get Dad's wallet. He, uh, he forgot it, and, uh, we need it to, to check into the hotel." She could see a blush rising under her tiger step-brother's fur as he shifted his gaze past her.
"Alright, I'll help you look," the Shepherdess heard herself offer. She turned back down the hall, her tail rising and unintentionally giving the tiger full display of her bare pussy and sending a full blast of heat-induced pheromones his way. Some rational part of her brain had given way. She knew that this was wrong, that he was her step-brother, but the rest of her insisted that she was a female in heat and he was a man capable of giving her what she so desperately needed. As she walked down the hall, she made sure that her hips swayed to entice him in.
Diane heard a low growl from behind her. The next thing she knew, she was pushed against the wall, the robe sliding from her body and collapsing onto the ground. A part of her was excited by the rough treatment. The Shepherdess yipped excitedly and thrust her rump backwards, tail wagging furiously.
Her gesture of approval was met by a sharp bite to the scruff of her neck. It wasn't quite enough to break the skin, but it was enough to let the canine know that her step-brother was dominating her. And gods, did she love it. She let out a whimper, one hand kneading at a breast while the other reached down to play with her sodden pussy. "Please, Spence," she whispered lustily. "Please. I - I need you."
First the teeth were removed from her neck, and behind her she heard the sound of cloth moving over fur. That must be his shirt. Then she heard a zipper, and the clatter of a belt being discarded onto the floor. Finally - finally - her step-brother was undressed, and she felt him step into place behind her.
"I'm ready when you are, little sister," the tiger snarled, biting into the spot where Diane's shoulder met her neck. She let out a cry that was both pain and pleasure, instinct making her buck backwards away from the pain, which only resulted in her wet netherlips grinding against the oozing tip of the striped feline's cock.
"R-ready," she crooned, heat spreading through her body as she anxiously awaited her step-brother's first thrust. Spencer was surprisingly gentle, carefully working his cock into her entrance and pushing until he met a solid barrier.
She heard him hiss behind her. "Di, you're--?" Before he could finish his line of questioning, the Shepherdess gave a powerful thrust backwards with her hips, causing her step-brother's shaft to break through her hymen with such force that he bottomed out in her sweltering-hot vagina. Diane couldn't suppress a moan, and she dimly heard Spencer groan as well at the heat and wetness inside of her. She guessed he'd been with girls before, but never a girl that was in heat.
Her step-brother began to rock his hips back and forth, the barbs on his cock dragging deliciously along the walls of her pussy. Diane yipped in approval, bracing her hands against the wall so that she could push back against him with every thrust he made. With every movement she felt hotter and hotter, the pleasure rising in a crescendo within her. His cock was wonderful. It certainly helped to scratch the itch, but in itself it would not quench the fire within her.
"More," she begged, casting a glance over her shoulder at the tiger. He lifted her up and spun her around so that she faced him. "Wrap your legs around my waist," he ordered. The very moment she had done so her step-brother braced her against the wall, placed his hands on either side of her head, and began to fuck her in earnest.
Diane's toes curled with each shudder that ran through her body. Her breasts bounced painfully on her chest, so the Shepherdess grabbed them and began kneading at them, her padded fingers occasionally flicking over her nipples and drawing moans from her muzzle. Through half-lidded, lust-addled eyes she studied her step-brother. Though she hadn't paid much attention to him before, seeing him as a friend and sibling rather than a potential lover, she could see now why women would be attracted to him. Though he was tall, he wasn't extremely buff like some tigers. He did go to the gym, though his muscles gave him a wiry, lanky look. The Shepherdess certainly approved of that look now as the feline held her against the wall with ease, pounding into her with everything he had.
"I'm going to... going to..." Spencer muttered, breathing quickly. Diane's heart fluttered in her chest. This was the moment she'd been waiting for. The moment when the flames of her heat would be extinguished. She leaned forward, embracing her step-brother in a kiss that somehow felt wonderfully more taboo than the act of sex itself. His tongue rolled into her mouth, swirling around as the two lovers embraced. Then the feline snarled into her mouth, his hips pistoning forward thrice more before his balls began to unload their sweet seed into the Shepherdess' parched womb. The canine pulled back and let out a howl, sent over the edge by the sheer bliss of feeling him fill her.
Panting, Spencer pulled out his cock, which was followed by a small trickle of mixed cum and feminine slime. Regained his senses, he stuttered, "We - we shouldn't h-have done th-that. If anyone f-finds out--"
"They won't," assured his step-sister, dropping to her knees in front of him. "And besides - it wasn't that bad, was it?" The tiger gulped as she began to suckle on his shaft, which, although the act was taboo, quickly began to harden again at the thought of performing it again.
** 9 months later **
Diane rested a hand at the small of her back, wishing her belly wasn't so damn heavy. She could feel the pups squirming around inside, even without resting her hand on her stomach. She'd be in real trouble if any of the pups came out as cubs, or worse, with their fathers coloring. The official story was that Diane had left the house that winter day and run into a male who - well, the rest didn't need to be explained. Spencer, on the other hand, went to the house and made it back to the hotel without a problem, other than getting a bit "lost" on the way back.
The heat incident could be explained away by Diane's pheromones. But neither of them could explain the numerous incidents since then that led to the pair of them fucking their brains out in either of their rooms while their parents were away. Even once her belly began to grow gravid, Spencer treated her with the utmost care - except when she didn't want him to, of course.
Just thinking about him made her wet. Her belly was so large at this point that she could no longer reach her slit. She depended on her step-brother - and lover - to take care of her needs. And to be honest, she was perfectly okay with that. The Shepherdess caught herself smiling as she rubbed one hand over her belly. As long as she had her step-brother, the father of her pups, with her, everything would be all right.
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