Getting a mischievous smile Jeff turned around and went back upstairs, making a beeline straight for his sister's room. Kicking open the door he strode over to tower over his younger sister, his pampers crinkling with every step.
"Jeff, don't you know how to knock?" Zoey replied in annoyance to her older brother barging into her room.
"Heh sorry, just wanted to see why my favorite sis was up to." Looking down at the dolls in her hands, "Playing with your dolls I see."
"Yeah...do you want to play house with me?" Zoey questioned uncertainly.
A cramping tightness made itself known in Jeff's stomach. Originally he planned to swipe her dolls and run off with them, but his body just presented him with an alternate way to torment his sister. The toddler gave a naughty grin at the act he was about to do.
"Sure" he said pretending to agree, "But first I just realized I got to make boom boom real bad."
Zoey was too late in figuring out his intention as Jeff spun around so his padded rear was facing her. Bending down and sticking out his butt he released his bowels with a grunt. Jeff beamed as he felt a big bulge form in the back of his diaper as he pooped out a long turd which quickly filled the inside of the seat. Despite the built in odor guards the smell managed to escape his padding, Zoey scrunching her face as she backed away.
"Eww Jeff gross. If you're going to make poopoo do it in your own room."
Turning back around Jeff placed his hands on his hips confidently to display his superiority, shaking his head, "Actually I think I prefer doing it in your room" he said knowing it would tick her off.
Zoey growled, "Get out!"
"Make me" Jeff smirked as he childishly stuck out his tongue.
Getting to her feet Zoey attempted to push her smelly brother out by force. However having a full year of developmental growth on his side Jeff was easily able to resist her efforts. Sidestepping he let Zoey fall on her on her face while he proceeded to wander about the room like he owned the place, spreading the stink from his dirty diaper. Acting silly Jeff did a soldier like march where he raised his foot high and brought it down with a stomp, enjoying how the contours of his diaper allowed such freedom of movement when he had a big lump of poo in the back. Distracted as he was by his full pamper he didn't care when his sister called for their mother.
"Mom! Jeff made a stinky and won't get out of my room!" she yelled loudly from where she lay on the floor.
Jeff continued to toddle for half a minute before the door opened to reveal their 3 year old mother, who had an angry look on her face and both hands on her hips, "Jeff, stop bothering your sister this instant" she demanded before crossing her arms.
Given that she was also a baby in diapers just like him Jeff found her authority amusing rather then scary. That is until the robot showed up standing behind her, crossing its arms as well.
Gulping at the intimidating sight and not wanting to make the machine mad he quickly replied, "Yes mom."
As punishment for his behavior Jeff has to...