You don't want to interrupt the game just to go to the bathroom like a child, plus you doubt Hannah would make things easy if you asked her, so you decide to just hold it in until you get an opportunity to go to the bathroom. You clench your legs, trying to do so without Hannah noticing, not seeing the ensuing grin from Hannah.
"Ok Baby Emily, time for some exercise! Babies need lots of it to grow into big girls!" Hannah says, pulling out some speakers, and childish silver ballet slippers. "I know it may be hard, but I'm going to try and teach you some ballet." While she was saying that as part of the game, the words rung true, as you had never been a good dancer. "Just try your best sweetie." She says as she puts on the slippers, handing Krista a smartphone behind you as she turns on the music. Instead of standard ballet music, the music being played sounded more like nursery music. At this point you were in a full on potty dance, not trying to hide it at all. "That's not ballet silly!" Hannah teases, slapping your padded butt, making you stop "Just do what I tell you". Hannah first instructs you to get on your tippie toes, standing straight. She then has you do some basic strides and spins, forcing your legs apart, your control of your bowels weakening quickly. She finally has you stretch down, touching your toes, your butt extending out far. When you stood back up, Hannah continued "Now, let's do something called a plie. First, rotate your legs and feet so your feet make a straight line from left to right. Good! Next, you're going to squat down, keeping your upper body straight, and bending your knees while arcing your feet up. Then just hold, and come back up! Lets try it now." You do what she says, lowering yourself slightly, holding for a moment, then quickly moving back up. Even this slight drop rapidly increased the pressure in your bowels. "No, no, no! That's not nearly deep enough, and you need to hold longer!" Hannah has you repeat, bending further and maintaining the position much longer, your bowels begging for release. However, when you get back up, Hannah again chastises you "Come on Emily, you can do better than this! Just do exactly what I say." You repeat again, but each time you stop Hannah tells you "Lower!", until finally your heels are just barely touching your diaper. "Now, hold it." After a few seconds, you begin to move up before she repeats "Hold it". You sink back, your bowels in critical condition. "Hold it!" At this point, you've practically forgotten about the ballet, only thinking about your bowels and diaper, the music making you feel even more babyish "Hold it" you tried your best to keep doing as Hannah said, using her words as encouragement "Hooold it" your heart raced, you could feel that it was almost time. "Now, release!" Focused completely on your bowels, you gladly complied, letting out a sigh of relief as you let go of your hold on your bowels, quickly flooding your diaper with mess, causing it to bulge out and push into your heels. You revert to your previous stretching position out of shock, your still expanding diaper proudly extended towards Krista's camera, your smiling face visible between your legs, your bladder letting lose at the same time. You finally finished, slumping down onto your head, throwing your legs and rear in front of you, the fresh mess in your diaper mushing on impact. You keep smiling as Hannah takes pictures and Krista finishes recording, until reality finally snaps back as Krista stops recording. "Well its a good thing we got a nice thick diaper on you now, isn't it?" Hannah said with a grin, patting your fully exposed diaper. Wait, why was your diaper exposed?