Didn't you brothers read the sister's story? It sure looks like you did not. Part of Islam is belief in Jinn. Rejecting Jinn and the things they can do is part of Kufr. If this sister is telling the truth, and it's not Jinn involved, then Allah SWT could only be humoring them with such a bizarre coincidence. And I don't think our Ilaha would do that.
I hope god will take revenge of him and his family..