Uh-Oh. Bella's mad at me.

So Bella came home in one heck of a mood. What could possibly be wrong now?
Her friend Ava Claire said that Bella had invited her over for a playdate and she had already asked her mom. Fine by me. It's actually easier for her to have a playdate because she will be occupied. Ava Claire's mom said no and I got the silent treatment. Bella refused to talk the whole way home and when I finally got it out of her she said that it was all my fault. What did I do? I actually told Ava Claire's mom that Ava has an open invitation whenever she wants. Now I have to assume responsibility for other people's parents' decision? I can't win!