The only thing you can do is explain to D your side of things. Of course, she's so young it won't make much sense to her. But the best you can do is stay calm and apply logic to the situation. Because your W is clearly in an emotion state that's only going to continue to cause harm. I know you were cool with being friends with W, but that has to exit your mind at this moment. You can't be friends with someone who is intentionally trying to turn your D against. Especially at a time like this.
