Petunia wanted to tell someone what she knew. Unfortunately, not only did she have no proof other than her own (biased) theories, but nobody would ever take her seriously ever again if she did. For the first time in her life, Petunia wished she had a way to contact one of them. She even wished to have a way to send her hellish nephew a letter to tell him. Apparently, he was some sort of hero in their world, so it should be his job to take care of these robbers.