She pees her diaper, hoping it would help with the stress.

Fresh pee trickled into her diaper, hoping that it would help, the diaper absorbing the pee like a sponge.

Despite the obvious discomfort she was feeling, Elsa did nothing but continue to feed Rapunzel, the jar of apple sauce nearly empty. She knew what was happening, since the formula she gave the two baby girls was cut with a strong laxative she found in the castle infirmary. She needed to make sure her babies were nice and healthy, after all.