Originally Posted by Sly

Your mom is most likely not updating WordPress or any plug-ins that she may have installed. Those are massive security issues, as you can see. Unless there is someone available to update WordPress and plug-ins on a regular basis, WordPress is really not the greatest idea for a site, especially not for the tech unsavvy that don't even know what WordPress is.

I suggest you put someone on retainer to check in once a month and make sure everything is up to date. You're only going to see this problem happen again and again. And it is not the web hosting companies fault or responsibility to keep your scripts up to date.