Mark pointed the remote at his mother right before the door to the kitchen closed behind her. Turning around he pointed the remote at his very little sister Heidi and tapped personality swap, focussing on their relation.
The remote buzzed faintly in his hand for a few seconds, until he heard a crashing sound of pots and pans coming from the kitchen. Concern for what he might've done rushed over him, as Mark flung the door open looking for his mother. What he saw instead was Heidi on the ground covered in flour coughing, surrounded by pots and pans.
"Sorry to startle you dear, I thought I could reach the flour you to bake you both some treats after dinner, but instead I made a bit of a mess, silly me." said Heidi in such a kind warm voice, which could only be described as motherly tone, juxtaposed by her diminutive stature. As she stood up and cleaned herself off, Mark could see the business suit his mother had worn, now fitting perfectly on Heidi. Gone were her pigtails, instead replaced by a smart burn tide off at the back of her head.
"I hope you didn't forget to change Gwen though Mark? With all the changes to the specifications at work, you know I appreciate you helping out." smiled a now clean Heidi, who had now pulled out a new stool in order to reach all the cabinets.
Mark had indeed almost forgotten, but not for the reasons his 'mother' thought, but who was this 'Gwen' she mentioned? "Sure thing, errr Mom." Mark had to force himself to say as he tried to work out what exactly happened. Going back into the living room he saw another peculiar sight; a 30-ish year old woman sitting in a chair doodling with crayons wearing a large pink My Little Pony shirt, covered by overalls and a frilly skirt, with a familiar bulge on her bottom. The woman's pigtails certainly reminded Mark of Heidi's former hair style, but then it dawned on him that he did know a 'Gwen'. Gwendolyn was his mothers name he had heard once or twice when her friends came over.
"Um Gwen, watcha drawing there?" cautiously said Mark, still not entirely sure of himself, yet quickly these concerns melted away as he saw the woman look up.
"Marky! I finissshed my school work with Mommy and coloured in my favourite ponies!" said Gwen proudly said holding up the rough and mismatched colouring. Her slight lisp barely phased Mark as he took in the ramifications of the remote this time.
Firstly, his mother and little sister had indeed swapped their relations. His little sister Heidi now acted as the mother, while his mother Gwen now acted like the little sister. Furthermore, reality had adjusted so that each of them had the knowledge needed for their personality, with no one finding it strange that such 'small' woman was a mother of two, or the fact that her 'youngest' was the size of a fully grown woman.
Gwen started moving out of her chair to come closer, causing a crinkling sound to come from her bottom, reminding Mark of his task.
"Gwen, Do you need changing?"
"Nu-uh. Imma big girl." defiantly replied the once mature woman, pouting as she crossed her arms, which just caused more ruffling sounds from her diaper.
"Gwendolyn, Mom asked me to check you. Now if you behave I'll play with you afterwards." Mark replied trying to act as stern as possible.
"Play? Can we bring Jess with us too!" said Gwen quickly changing her mood.
"Fine. Go lie down on the changing mat."
Mark left to grab a new diaper and some powder, when he came back he was met by his well-developed 'little sister' lying on her back, bare chest with only her diaper on full display. A diaper which on closer inspection by Mark, was indeed well soiled. Looking back at Gwen he saw her blushing profusely as Mark began to undo the adult-sized diaper.
"Its perfectly normal Gwen, there is no need to be ashamed of." Mark said, seeing the blush fade from her face as he begun carefully dabbing away any mess. He couldn't believe there before him was his former mother, lying naked as he repeatedly caressed her pussy.
"Hehe, that tickles Marky" as Gwen started squirming it caused her breasts to start bouncing and jiggling.
Mark finished cleaning up the remaining droplets on Gwen's hairy pussy and wrapped her back in a fresh diaper decorated with unicorns.
At this moment Heidi came back in, now in a casual shirt and trousers with an apron over the top, followed by Jen eagerly staring at the dog bowl in her hand that read Jen around it.
Mark thought it was time to he use the remote again.