A wave of musk reached her nose and she caught movement out of the bottom of her eyes. Looking down, her eyes went wide as she watched her brother's cock grow. Not grow, but extend. The wet and shiny pink flesh steadily pushed out of a long, furry sheath. As more of it came into view, it slowly swelled and rose to just below horizontal, held down by its weight. It was not uniform in girth along the length, swelling to be slightly thicker in the middle than at the ends. The tip was mostly a flat surface that tapered to an inch long point that extended out from the bottom beneath a hole that was already dilated and leaking precum. The syrupy substance collected on the pointed shelf below before slowly dripping off the end. As it neared its full thirteen-plus inches, Liz pursed her lips and furrowed her brow when the deflated sack at the base that would ultimately lock them together appeared, remembering how it had felt. Between his muscular thighs, his large balls swayed heavily in their obscenely hairy sack. As she stared at them, she was sure she didn't imagine the testicles sliding around inside their home, visibly churning as production of his semen moved into high gear. In all, his genitals were completely inhuman in their canine appearance, fitting for the werewolf he had become.
She shivered as her brother placed his broad, callused hands on her ass and pulled her close. As he massaged her backside, the tips of his long, pointed nails dug into her flesh but all she felt was the throbbing of his wet cock pressed against her abdomen. Because of the difference in their height and the excessive length of his dick, the tip of it reached between the bottom of her heavy, milk-laden tits. As he slowly humped against her, she could feel him depositing precum in the narrow space between her tits. It mixed with the slippery, lubricating fluid that seeped out of the surface of his cock and allowed his length to glide effortlessly against her.
Ed gently guided Liz to sit on the edge of the bed then knelt on the floor between her legs. Leaning forward, he extended his long, lupine tongue and used it to lick and tease one of her nipples before sucking it into his mouth. The flow of warm, sweet fluid began almost immediately and he savored the flavor of her milk only briefly before switching sides to repeat the process. While his mouth moved back and forth consuming her tit juice, he used a hand to play around the sensitive folds between her legs. Careful not to injure her, he alternated using his nails to torment the sensitive skin and the callused pads of his fingers to then soothe it. He could smell her arousal growing and could feel the wetness seeping out of her. Each time his hand moved near the top of her opening, he drew close to but intentionally avoided touching the hard nub that peeked out of its hiding spot.
Liz moaned openly at the sensations coursing through her body. She knew she should warn him against drinking too much of her milk because she'd need to nurse soon, but his lips on her felt too good. She wanted to roll her hips against his hand, beg him to push a finger inside her, touch her clit, but his dangerous nails kept her immobile. She could feel the fire of arousal burn throughout her body and cursed that she couldn't completely surrender to it. However, she acknowledged her self-restraint only served to heighten the experience that rationally she should not be enjoying.
With a final, loud sucking sound and a gentle bite to her nipple, Ed pulled off. As he continued to finger the outside of her pussy, he said, "Fuck. That tasted better than I expected. No wonder the twins keep going for it."
Liz tried to respond with a sisterly, sarcastic tone but the heavy note of arousal in her voice failed to convey the sentiment. "I'm sure it has nothing to do with the fact that they're only five months old."
"They wouldn't drink it if it was nasty," Ed countered. "Lay down."
Doing as commanded, Liz swung her feet up to lay on the bed. Ed followed almost immediately and placed himself between her legs. His cock jerked erratically with his arousal and she could see it pulse visibly. With the multi-colored blood vessels visible just below the shiny skin, the throbbing flesh looked even more inhuman than before. She let out a soft whimper that was a mix of fear and revulsion upon seeing the sack at the base inflate slightly.
As Ed got into position above her, sliding only the point of his dick between her swollen nether lips to help line himself up, he ran what was supposed to be a calming hand over one of his sister's cheeks. He saw that he failed in the wary, almost frightened expression that immediately took up residence on her face. "Don't worry. I'll be gentle."
"Liar."
Ed didn't respond. He pushed forward, feeling her reluctantly open for him. Even with her substantial wetness and the natural lubricant seeping from both his piss hole and the outside surface of his cock making the job easier, it was slow going as her pussy had to stretch around his wide, lupine girth. The tightness pulled a moan from him and he felt his dick become fractionally harder. Looking down at his sister's face, he saw that her eyes were closed tight and her full lips had disappeared as she pressed them together against the pain she was feeling. Part of Ed hated what he had become and what he was doing. However, the animal slowly taking over and the pleasure radiating out from his dick pushed it all to the side. He had to do this, he was compelled to mate whether he consciously wanted to or not. If he didn't give in, he wouldn't be able to control himself and the results could be much worse.
While most people thought it was the moon that caused a werewolf to shift form, Ed had learned through talking to other werewolves that it was in fact the hormonal changes that women underwent during ovulation that stimulated the change. For the few hours surrounding the release of an egg, the scent was the strongest and werewolves were attracted to it. Millennia ago when villagers equated the woman's cycle to that of the moon, the incorrect interpretation and retelling of tales led people to mistake that it was the moon that was the cause of the shape shifting, while the belief of a werewolf's violent bloodthirst came from being conflated with the more visible monthly bleeding in a woman's cycle. In fact, werewolves were no more bloodthirsty than the average human. Each had his own personality and while there were evil ones out there, they were no more likely to harm someone intentionally than any other human. Most werewolves did acknowledge, however, that sexual assault was higher among their kind than the general public. Because of the biological imperative to mate with an ovulating female, werewolves did not take no for an answer.
After being infected and attacking two women, Ed had moved back to his parents' farm thinking it was a safe place to live. However, only a day after moving back in, Liz began to ovulate. Having never considered her a "woman," he hadn't considered his sister in his plans. After explaining his predicament to her and their parents, Liz had reluctantly surrendered to him and nine months later, she gave birth to twins. He was surprised by the change he felt upon holding them for the first time. They were his children and Liz was their mother.
And she was his mate.
Despite whatever protests she made, they were now bound together, they were a family. They were his pack. When the time came, whether she liked it or not, she was his to breed. Provided she never left home, which would become increasingly difficult as they had more children, he would lie in wait for her cycle to return after giving birth. For however long she was fertile, she would belong to him. With her remaining close, he could mount her the moment she was ready, as he had just done. And now that he was inside her, the only thing that mattered was completing his mission. He had to get his seed into her.
Liz focused on her breathing as she felt the slightly inflated sack at the base of her brother's dick enter her. His wide shaft already made her pussy feel like it was stretched to the limit and she wondered if she might tear again after having recently given birth when the growth pushed inside her. Despite the pain and worry, her body wanted the fuck. It remembered what it had felt like the first time—which was the only time—they had been together. And not having had sex since then, her body responded eagerly. The fullness of his length and girth was surprisingly familiar yet unlike anything she had ever felt from any of her previous boyfriends. As he pulled back and began to find his rhythm, her body shook as his cock was forced against her clit. With her opening stretched wide, the tiny nub was more exposed than usual and had no choice but to hang down and kiss the top side of his driving length. Each thrust inward also drove his growing knot against it, stimulating it further with a mix of pain and pleasure. But unlike when he was fingering her lips, she didn't restrain herself from rolling her hips against her brother's crotch.
