My coworker gets angry whenever I ask her anything work related. Is this normal?

I have to schedule my break time before she cashes out, and she likes to leave early. Today she got angry because I asked what time she was cashing out...

'HOW many times have you worked with me Sundays and Mondays already. I'm not telling you because you should know already.'

I waited a few minutes then said, "You know I was being considerate asking what time you cash out, so that I could schedule my break at the right time.'

She was still angry and said, 'You do whatever you like, take break whenever you like. I'm not talking to you again about anything.'