As if you'd magically let her buy something if she snuck in :redface2:
Last I looked, 'pregnancy' wasn't a valid excuse to not be at work. And from the Employers point of view: you want EVERY available employee working on a big day like Black Friday; no excuses.
It is in no way the employee's fault for crazy fucking people. Breaking through the glass to get in? Come the **** on. What are they, a fucking zombie horde?