She craps herself

Erza/Juvia's bowels erupt and she lets herself go into her panties. Her underwear was filled with a giant smelly mess in a matter of seconds. If it wasnt humiliating enough for her that she was pooping herself, she was farting loudly in front of Lucy. Speaking if which, Lucy stood there in shock as she watched her friend crap herself.

After a few minutes, Erza/Juvia was finished and her panties were sagging so much with the huge mess that was inside of them. There was a large noticeable brown stain on the back if the clothing covering her butt. The smell was horrible and caused both if the girls to cover their noses. Erza/Juvia blushed a new kind of red with the embarrassment she was feeling. She then began to cry in shame, trying to hide her face in her hands.

She bawled for a few seconds before Lucy hugged her in an effort to comfort her. "Hey Juvia, it's okay. We all lose control sometimes." Lucy said, trying to calm her down. It worked a little as Erza/Juvia ceased crying for a second. "I'm so embarrassed." Says the smelly girl. Lucy then looked at her. "Would it make you feel better if I told you an embarrassing secret of mine?" The crying girl thought for a minute. She then nodded.

Lucy opens her mouth. "Okay."

What was her secret?