Megan was unable to live with either her father or mother trapped inside of her womb for who knows how much longer. If it were anyone else, she would have not minded staying like this for a while. Her current life with her "wife" Alice (Alan) would have been livable and potentially quite fun too. But she needed her parents as well.
So she grabbed the book and flipped it open again, without even talking to Alan first, though she was confident that she(he) would have done the same since he technically may not be able to properly give birth. She started flipping through pages, not remembering about how she is just meant to read it normally until it is too late, again. The same thing as usual happened. A blinding light as the world changes around them.
When the light finally faded, Megan was down on the ground, on all fours, next to her was Alan in a similar position. However something about Alan was not right. Specifically the 8 small mounds that lined his chest down to his belly button, and the lack there of any semblance of his manhood, now replaced by an unusually shaped pussy.
Megan then looked down at herself, and found out that she instead had the dick. And it was not a normal looking one either. She was about to investigate further when her parents stood up, no longer fetuses trapped inside their children's wombs. They were mostly back to "normal". Her dad was still apparently a seen as woman though, given his dress a d heels, and their mom was a man where it counted too, as shown by the obvious buldge of an erection in her pants.
"Kids? Oh... uh... huh? Well, you were ment to read the book remember, so this one's on you this time" said Steve, placing a manicured hand on his hip. Jannet walked over behind Alan and took a look at what became of her son. With a grin, she stood up. "Alan, come with me honey" and walked out of the room and into her bedroom without another word. With no reason to not, Alan walked on all fours after her, leaving Steve and Megan alone together.
Once they were alone, Steve moved close to Megan. "Megan, I want to let you know this ok, but I am pretty sure you amd Alan are meant to be out pet dogs in this current reality. And specifically, our sexual partners I think. Look, my pussy is soaking wet from just looking at you. And just so you know, this is a dog's pussy. Alan seems to have turned into a bitch though, so he likely belongs to Jannet too, since I think she now has a dog's cock. I do not wish to fuck my daughter, but I hope this version of me is able to hold off on the urges long enough, though I hope Jannet is sensible enough to not fuck Alan either. I will check on it, so stay here. Please."
With that Steve got back up, and hurried away towards his bedroom in such a girly manner that it was awkward for Megan to watch. The issue for Megan though, was the scent that her father just left behind. She was so horny now, and he smelled exactly like someone who needed her canine cock inside of them.