OP here, all of the suggestions saying go to a higher up are great, but the only reason I can't do that is because it's a family owned restaurant. I am the assistant manager and I've been working there for almost a year; I've only called out twice. My bosses are the owners son and nephew. There's not much I can do about the situation other than leave the job as this isn't the first time they've left early while I closed the restaurant. Thank you all for the concern about my grandmother. She is doing alright now and she's stable.