Once things stopped, Erika rose from the toilet slowly. Once she had done so, she turned to get a look down at herself, still exposed from the waist down.
Nothing looked different despite what had just occurred, but it definitely felt like something should have been. No way of knowing what, though this wasn't --
"Uh.... oh...."
There was a sudden urgency in Erika's stomach and rear, and it took her a moment to realize just what that might be. Thankfully she was still toilet-ready and right in front of said object, so she sat down just in time for her to begin to helplessly empty her bowels into it.
And then a stray look downward revealed that her panties were both no longer wet and, much more importantly, gone. Now around her ankles was but a pair of training pants.