For anyone else reading this issue.
In order to resolve this problem, you need to have access to the file structure through ftp or through a cpanel (control panel). Steps:
I first loaded a script that I have written to zip all of the files and backup the data. I executed the script to create the zip backup.
Next, I copied the current wp-config.php and her .htaccess files offline to my working machine (as a backup to restore later)
Then I took a default installation of wordpress and loaded the files. (Actually, I loaded the zip file and then unzipped it on the server and moved the wordpress directory into the root wordpress directory, thus over-writing existing wordpress files. It does not touch any additional themes or other files which are not part of the original install. )
Then I re-copied her wp-config.php and .htaccess files back into her root wordpress directory.
Then she tested to make sure she could re-login and work. Yep. Everything working again.
Then I deleted the zip backup and the zipped wordpress installation that I put on the server.
indamarisa, you probably ought to mark this issue resolved. Use the drop-down menu on the right side of this page.