Pee.

A familiar twinge catches Penny's attention, given that she hasn't yet gotten used to diaper enough to wet them at night. She closes her eyes and breathes a sigh as she lets go, feeling her urine soak into the padding, all the while she sits in her luxurious bed, never stirring or considering getting up to use the potty. Penny smiles, blushing at the feeling of her own refusal to bother even trying to make it to the toilet. The sheets remain pristine, her "accident" not having even touched them.

Penny picks up one of the several plushies lining her princess bed, an elephant. She turns it over in her hands idly, considering what she should do next. Maybe go back to sleep, to encourage the action of sleeping when wet? If she's too awake already from the excitement of using her diaper, maybe call out for mommy to make her take care of her little princess?