Well you missed a real opportunity when you found her on the floor.
I mean...surely it might've occurred to you to say 'dock that honky a days pay for nappin' on the job'
But seriously, people from her generation move in and out of those terms all the time and most likely mean no malice with it. You have to consider people with an understanding of context. Don't be butthurt, own it and be an example of why it's ok to be of asian descent. That's how you teach folks to change their attitudes.
Keep in mind women from her generation were kept ignorant and pregnant in the kitchen. She probably can't even balance a checkbook or tell you how a car loan works. If anything she deserves your pity.