Why the Attitude?

For the past couple of weeks everytime I ask her to do something for me while she's in here every 4 hours, she gets an attitude. She doesn't verbally say anything all the time, but it is apparent that she's ticked off about something. I mean, I ask and she twists her mouth, clicks her lips and rolls her eyes. I would ask her about but....I don't know. Yeah, I hate that I'm in this situation as much as she does and if I could change it, I would in a heartbeat. Right now it is what it is.