Laura thought it would be more fun if she had someone to share the remote with, and when she thought about who she thought of Erika, her best friend. She put on some comfortable clothes and, knowing that her friend should be home at the moment, she went there. Along the way Laura set up the remote so that she is always aware of any changes that occur.
When she arrived at Erika's house, before ringing the doorbell, Laura had a fun idea. She said "I wish I was a little fairy" She heard the beep that confirmed the remote had picked up the command and then she shrunk, getting smaller and smaller until she was only 6 inches tall. As the reality alteration was activated, her clothes shrank too, with two small slits opening in the back to make way for her wings that grew soon after.
Testing the new body, Laura learned to fly quickly, and so she flew and entered the house through an open window on the second floor, which was Erika's parents. She left the room through the gap under the door and flew around the house looking for her friend and found her in the living room, she was sitting on a sofa while playing with her cell phone, her parents were near her watching TV with her mother resting her head on her father's shoulder.
Laura flew up behind them, sat on a picture frame and...
**Erika's POV**
Erika was bored. She hadn't made plans or had the inspiration to go out that night, and she didn't even have a boyfriend to go on a date with. She had then sat down to watch TV with her parents, but the program they had chosen was too boring and she preferred playing games on her cell phone. At one point she thought she heard her best friend's, Laura, voice very softly, so she couldn't make out what was said. She looked up and around, then laughed at herself for looking for her friend who wasn't even there.
Erika was about to go back to playing on her cell phone when it happened, suddenly the bottom part of their clothes exploded and disappeared, the same happened with the sofa they were sitting on, which also disappeared as if it had never been there. Yet they barely moved from their spot as their bottom half quickly turned into a horse's body.
"Mom, Dad, look down." Erika told her parents, who were now a couple of centaurs.
Erika's parents looked down, but they looked as if they were looking for something and found nothing.
"What did you drop?" Erika's father asked
"I didn't drop anything. Don't you realize that your lower part is a horse's body now?" Erika said
"It's obvious that our bottom halves are horse bodies, we are centaurs after all." Erika's mother said
"But mom, you weren't centaurs until a minute ago." Erika said
"Don't call me mom, remember that I'm your dad." Erika's mother said, standing up and pointing a finger at her as she did whenever she got mad and scolded someone. This allowed her to see the ballsack dangling between her mother's rear legs.
"Calm down honey, she's just kidding. She's bored too, but we can beat the boredom right now." Erika's father said to her mother, getting up and hugging her, then they started kissing and he grabbed one of his wife's breasts.
"I'm not kidding, you..." Erika said and stood up, but lost her balance and fell to the ground, only then did she realize that the lower half of her own body was also the body of a horse. She had been so focused on her parents becoming centuros that she hadn't even noticed herself becoming one. She tried to get up, but had difficulty as she got used to her new body, and in the meantime her mother's cock came out hard from her shealth and throbbed as it dripped precum beneath her.
When Erika finally managed to stand, her dad turned around and had his back to her mom, who lifted her front legs and mounted him, thrusting her equine cock into his pussy.
"Stop, don't do this in front of me." Erika said, feeling a little embarrassed to see her mother fuck her father in front of her as if it was normal.
"What's your problem today? You've never worried about us having sex around you before." Erika's mom said and continued fucking her dad as if she hadn't been interrupted.
Erika didn't know what to do. She and her parents had just become centaurs and her mother fucked her father, yet only she seemed to know what had happened, as if to her parents they had always been centaurs.
"What do you think?" Erika heard Laura's voice again, this time much more clearly than before. She looked around for her but saw no one. "I'm up here." the voice said and she looked up, only to be startled to see her best friend, who was now a tiny fairy and was flying in front of her.
"Laura? Since when are you here? And why are you a fairy now?" Erika said
"It's because of this. I bought this magic remote that I can use to change anything. It's because of this that I was able to become a fairy, and I also made an extra addition to myself." Laura said lifting up her skirt, showing the bulge in her panties, which was small but big for her body size.
"You what? So it was you who turned me and my parents into centaurs?" Erika asked to her friend
"It was me. I made your family a family of centaurs whose horse half is the opposite sex of their human half." Laura said
"I can't believe you did this to me." Erika said and quickly looked under her own equine body, seeing then that she was a boy down there.
"What do you think? You're not going to say you didn't like it, are you?" Laura asked
"It's not that I didn't like it, but you could have warned me earlier. You can't imagine how scared I was when I saw my parents transforming." Erika said, pointing at her parents who were still fucking, so absorbed in the act that they didn't even notice the two girls talking.
"I know, but then it wouldn't be so much fun. You had to see his face, it was hilarious. I even boosted your parents' libido and took away from them any inhibitions about having sex in public." Laura said
"That explains why my mom is fucking my dad like this in front of us and doesn't feel uncomfortable. But why don't they find the change strange? And my mother even scolded me saying that she is my father." Erika said
"It is the reality altering function of the remote. With this function activated even the past changes, and in the altered version both they and you have always been centaurs. Probably how their reproductive part is reversed in the new reality it seems that they reversed the position in terms of parenting towards you. You can also choose who will be aware of the change that occurs, and in the case of your family, now only you and I know that something has changed." Laura said
"Does that mean that if I go out like that, no one will wonder why they think I've always been a centauress?" Erika asked
"Exactly." Laura answered