Jake nervously sucked his thumb thinking how to get himself out of this, and suddenly inadvertently started urinating in his diaper. Jake became even more distressed by this sensation and almost started crying, but instead he was kind of intrigued. When he peed, he was used to the sensation of pee running through his penis, but instead it felt more like it came from inside of him. He reached with a finger inside his diaper...and felt nothing. He could even reach inside a bit, a feeling that shook him - or rather her - so much that Jake finally started crying.
Her mother came into the room at the sound of Jake crying and said:"Aw, what's the matter? My little girl did poopie in her diaper?" She put Jake on the changing table, removed her diaper and saw only a urine spot in the diaper. "Oh, you peepeed in your diaper...well then, let's get your changed." She reached to get a fresh diaper as she removed the old one, and for the first time Jake actually saw her groin - almost completely smooth, revealing only a tiny fold. Her mother cleaned her, put on a new diaper and put her back at Timmy.
Jake said to Timmy:"What happened? I thought we only turned into babies...was this some kind of special option or something?" Timmy replied:"Uh, actually...I think I remember something of a boy/girl option next to the baby button. Didn't check that...I guess it was set to girl." Jake put her thumb in her mouth and started thinking. "That must mean you're one too, seeing as you're my twin...sister." Timmy reached a hand into her diaper, and quickly verified this. "So, we're baby twin sisters now...what are we gonna do?"