tbcg

This sounds like "The witches next door" by Lizzy. I think it was posted on the abdlstoryforum.

I really like this story and hope you write more of it. If you need inspiration, I have two ideas how you could continue the story: Maddie stops to make the hand-in-warm-water trick on her sister and also stops to check on her. Holly wets nearly every night now, so Maddie can finally sleep in the night again and didn't need to stay up until 1/2/3 AM! Maybe Maddie always used the bathroom after she had made her sister wet her bed/diaper. And now, as she sleeps a normal sleep again, she begins to wet her bed at this times. Holly starts doing the same to Maddie, without knowing that Maddie was the source of her bedwetting. Just because her sister made fun of her.