Lucy and Erza/Juvia pee themselves

"You know what? I think I know just the thing to make you feel better!" Lucy says enthusiastically. She started grunting. The other two girls were confused at the sight. But not a moment later, the front of Lucy's skirt became soaked and a yellow liquid drained down her leg.

The other two girls were shocked as they had just witnessed The celestial Mage per herself. "There now your not alone!" Lucy said with no shame. "Now it's your turn Erza!" She said to Juvia's body. Erza/Juvia was skeptical, but she was already wearing a diaper, so what's the worst that can happen.

She grunted and filled her diaper with her warm urine. The diaper was filled to the point of overflowing. She was blushing, but only slightly.

Juvia/Erza was shocked. Two of her friends just peed themselves to make he feel better.

What happens next?