There are - so far - absolutely NO articles in German media mentioning that she'd be here in Germany.
Some tweets of people requesting (directed at TV stations or newspapers) that they report, but actually nothing official out.
I very much doubt that there ever will be. However no articles actually means that the rumors could be true. If Haya fled with her children as suggested by some arabian articles, she's certainly not in the position to mess up with her husband. Her place of residence should better be hidden for safety reasons.