While Biff and Laura were trying on clothes Jon was left alone with Rachel. He kept thinking about how he would have to go to daycare tomorrow and he didn't want to make things anymore difficult for himself by doing anything out of character. He remembered what Biff had told him about copying Rachel's behaviours today so that's exactly what he was doing.
He was currently sitting on the ground playing with a doll, just like Rachel was. Rachel was babbling away, not making much sense. She used some real words but mostly small words like "Mommy", "baby" or "boppee". Jon was doing his best impression of her, even trying to copy the soft, babyish tone of her voice. Rachel never sat still for long for long, constantly changing from sitting to getting up, moving around and sitting again. Jon was doing the same, even copying her awkward way of getting up from sitting by first sticking his butt up in the air before standing up straight. He was careful not to walk too steadily, regularly falling back down onto his bmdiaoered butt and giggling just like she did.
At one point Rachel picked up a pacifier that was clipped onto her dress. Jon looked around his room and saw a pacifier sitting on top of his dresser. He got to his feet and waddled over to it, not hesitating to put it in his mouth. He enjoyed the feeling of it. It was like chewing gum and gave him some comfort, almost like he could hide behind it. Pretty soon, he forgot it was even there as the suckling motion just became natural.
A short while later Rachel was toddling around when she stopped and squatted slightly. Her face went a bit red and Jon knew she was pooping. She didn't miss a beat, as soon as she was finished she went right back to what she was doing, not changing her behaviour in the slightest. Jon knew that this would be hard to do as any time he had pooped in his diaper he had been very embarrassed and wanted it cleaned up straight away. He gave the front of his diaper a squeeze, it was a little bit wet, which he hadn't even noticed but he hadn't pooped in it and being honest with himself he had no idea when that might happen, nor did he have any chance of stopping it. He vowed to try to not let it bother him when it did happen.
He didn't have to wait too long, he had a big breakfast and a full bottle of milk not too long ago. Jon went back to playing with the dolls, babbling away to Rachel. He was even starting to enjoy himself a little bit. There was no stress and no expectations on him. After a few minutes Jon got up to grab a different doll and as he bent over to pick it up he felt his bowels release and he filled the back of his diaper. He tried his best to ignore it and continue playing but when he sat back down he felt it squish around his butt. Rachel had watched him go but didn't pass any notice. They both continued playing, neither of them noticing when Biff and Laura popped their heads in the door and just observed the cute babies for a few minutes.