Lucy's more-dog-than-human sister Jeff had warned her that their mother wanted her soon after Lucy had sat down at her sister's computer, found the Chronivac app, and used it to gift herself a pure bred dog cock above her pussy, but Jeff didn't take time to warn her what her mother wanted from her (as Jeff instead seemed more interested in teasing her just filled dog pussy in Lucy's direction). Lucy was dying of embarrassment and just about to start worrying about the silence of her mother as her mother just seemed to only stare at the canine erection in Lucy's skirt right up until Lucy finally noticed that there was considerable drool involved in that silent stare. There was some obvious drool in the corner of Lucy's mother's mouth, Lucy realized with a start that there were a few drips of much less obvious drool running down her mother's tan, well toned, and well groomed legs.
Lucy wasn't sure she would have ever noticed quite how nice her mother's legs were before in this way, but from her perspective she'd also never had a cock before now. She shifted a bit uncomfortable in Jeff's computer desk chair to adjust her bulge and its position between her thighs and the way it was tenting her skirt. She tried very hard not to think about the fact that she had needed that maneuver maybe because she was having a few thoughts about what sort of sort mound those dew drops of drool dripped down from and how much like or unlike that mound might be to the one between her own legs that starting to feel a bit soggy below her erection. She realized that her maneuver in the chair had left her erection pointing even more directly at her mother's direction and tried to hope that wasn't a subconscious signal that her own genitals were conspiring to help her mother might pick up. She tried as nonchalantly as she possibly could to ask the obvious question, "What can I help you with mother?" It sounded so sweet and innocent to Lucy, but only in that way that it sounded entirely fake. It sounded like a bad porn actress playing dumb and Lucy knew it. Lucy was afraid that even her voice was conspiring to send dirty signals that she wasn't entirely sure she had thought through the repercussions of just yet.
Lucy's mother bit her lip subconsciously in frustration. Lucy had heard from guys at school that the gesture drove them wild sometimes and had even tried practicing it in the mirror a few times to see if she could pull it off intentionally. To her it always just seemed to look like ugly pouting before. But her mother doing it in this way lit her brain up like a sexy pinball machine and Lucy almost gasped at the feeling her libido had yet another higher gear of wanting to get laid and the disturbing realization how much her sister and her mother had contributed to that degree of horniness.
(Lucy was maybe too caught up in thinking with her doggy dick to properly blame her own self for giving herself a doggy dick in the first place, much less some of a dog's additional senses, and apparently some of a dog's libido without fully thinking through the repercussions. To be somewhat fair to Lucy, she'd only had a few minutes of alone time with her new doggy dick to have any sort of expectations about the repercussions.)
Lucy's mother walked over to Jeff's bedroom door and shut it as silently as she could manage while as quickly as she could get away with. She just about ran back to Lucy and then squatted down just enough to bring her mouth to Lucy's ears, Lucy still seated in Jeff's computer chair, and panted in a breathy, pleading whisper, "Please, Lucy, I need you to knot me. Please! You know how hot and bothered I get helping your sister get knotted by her clients. I need to be knotted so badly. Your father will be home soon and I don't have a lot of time to do that peanut butter and treats trick with our dog right now. Besides your knot is bigger and better than his and we both know it. Please, Lucy, knot me with your big bitch breaker."
Lucy did not expect such a confession and didn't entirely know how to respond. Of course her libido and doggy dick had no question how to respond. Her dick seemed quite swollen with pride at being called a "big bitch breaker" and with the door shut Jeff's bedroom smelled all the more like a bitch in heat had got pussy juice all over the room. Yet Lucy also didn't want to rush into anything stupid she'd later regret. She had always known her mother to be an animal lover, but never quite expected her mother to be that much of a pet lover or that literal of a pet lover. Though Lucy was also starting to realize that both she and her brother were obviously interested in at at this point with all of their dogs parts and maybe the apples didn't fall too far from the tree.
Lucy's mother on the other hand did not hesitate at this point, she got down all the way onto her knees and turned away from Lucy to drop onto all fours. Lucy's mother only had to quickly shift her dress to make it very clear to Lucy, who had a great view of it, that Lucy's mother was not wearing any panties and her pussy was very well lubricated (Lucy had not imagined the drool from earlier and her imagination of what state her mother's pussy must be in was rather close to what she was seeing).
Lucy's mother whined from her incredibly exposed position, "Hurry Lucy, we don't have much time! We don't want your father to catch us still knotted again."
Lucy's mind wheeled at that simple "again". From her perspective she had only had the doggy dick for a few minutes and certainly had never knotted anyone with it before, but she hadn't even considered that the Chronivac might be powerful enough to rearrange her history and what the repercussions of that could be. It started to dawn on her that the Chronivac was her sister's app on her sister's computer: Did her sister even have that accident from her perspective? What sort of crazy person was her sister Jeff that she might have done that to herself willingly? Was Lucy any better for maybe thinking it was hot her sister might know what she wanted and maybe she wanted to be a submissive bitch-girl and just about perfect broodmother? The continued strain in her skirt reminded her that not even minutes before she'd wanted to be a breeder of bitches like her sister and maybe that her sister wasn't any crazier than she was.