Trying to think of an option, she realized the hilarity of wearing a diaper to grant wishes. As such, she decided to make some good use of this diaper. Right now in fact.
"I wish that I was completely bowel and bladder incontinent." she said to herself. It took approximately five seconds for the effects to set in as her bowels and bladder suddenly seemed in desperate need to be released. Before Rachel could even take another step, she felt herself suddenly let go and a warm wetness and squishy mess fill her diaper. When she was finished, she sighed in relief. That didn't actually feel so bad...
Her sister looked at her with widened eyes. "Did you just..." she said before sniffing the air. "You did! You messed yourself!" she laughed a bit. "I'm going to go tell mommy about this!"
Rachel grimaced. She forgot her sister was there and this was indeed an abnormal situation. She then decided to wish that...