Going back a minute or two, Jannet leads Alan into his bedroom. The now obvious bulge in his pants looks almost straining to get free. Alan doesn't know why, but ever since she followed her mom, a certain smell bas taken the bulk of her thinking abilities. She can't get that wonderful scent out of her head.
Jannet tells Alan to get up onto the bed and face away from him. Alan did as she was told and hopped onto the bed. Jannet didn't pause or hesitate and grabbed Alan's hips, locking her down as he began to lick her canine pussy. Alan was not expecting this development, but couldn't fight against her desire to just let it continue either. It was wrong, yet felt so wonderfully good.
Once he had gotten a taste, Jannet stood back up and removed his pants, whipping out his canine cock, already fully extended out of itself sheath, and thrusted it into Alan. Alan let out a lust filled whimper and pushed herself back onto her Mom's cock, which she discovered to be the source of the wonderful scent.
The two began fucking like animals, well technically Alan is meant to be an animal now. Things have just started getting good when Alan's Dad enters the room and immediately starts having a fit when she sees what is happening. "Jannet stop, that's Alan, our kid!"
Of course Jannet just waves her off and refocuses on screwing his bitch. Steve attempts to try and break then up, but is knocked down onto the floor before she could even take 2 steps. "I'm sorry dad, I just need to do this though." Says Megan, who mounts his Dad and sticks his own dick into her pussy.
The second Megan entered her pussy, Steve lost all of her will to fight against it. Getting fucked felt way too good right now. She began timing the sway of her hips with Megan's thrusts in order to get the most enjoyable fucking she could manage.
After about a half hour of this, Megan and Jannet's knots finally have decreased enough to slip out of their respective bitch's pussy. Now that they all were satisfied. Steve and Jannet took to the book in order to read it properly and fix everything. While they read, Alan was sitting underneath the table, sucking and lapping at Jannet's cock and balls. While Megan had been let outside for the time being, since he wouldn't let Steve help and kept pushing her down onto the ground to fuck some more. And as much as she wanted to do just that, Steve was able to stop it and set Megan outside. And not wanting to further complicate things, they all agreed to leave Alan inside, so that Megan couldn't get any new "urges".
About an hour into reading, they had learned what currently is happening to them. There was a log apparently in the first several pages of the book, containing the current and previous world data when compared to the origional one.
This world is one where human and dogs have a closely shared ancestor, so close that they are able to safely mate with each other. All genders have been flipped, and society views each person as their new gender, reguardless of how they physically look anywhere else on their body. People and dogs are particularly weak to their urges to breed. And won't be able to hold out for long if there is the opportunity to have sex with their mate. Society also values purebreds and there is no health concern with being or creating them.
"Well, that explains this situation at least. Now, how do we undo all of this back to our origional world setup is the question" States Jannet rhetorically. He is a little bit burned out from all of the new information, and is also horny again for more of Alan's bitch pussy. Steve already had abandoned them to go outside and fuck Megan again. And that was over 20 minutes ago anyways. "What do you say Alan, ready for round 2?" He asked. Alan backed up and turned her pussy towards him. "Yes please" She said in the new feminine voice she gained in this world.