Sure it would. 20 hours all over the place makes it really hard to schedule any other jobs or whatever (which they often do on purpose specifically to make it harder for you to find something else to reduce your availability), so it’s about as accurate as you can get knowing full well in 2 months you can return to your normal life..

Seems like a typical shift for fast food workers. They don't want them to be full-time and eligible for any kind of benefits.

The manager probably wouldn't give her more anyways if she was a full time employee so they could avoid paying for benefits.