Fake hair?

OMG!!! I twisted my hair last night. Today, in a training class, an idiot co-worker comes up to me and asked if I used nappy hair. Already offended, I said "what?"  She said do you use the nappy hair or the kinky hair.  Knowing what she was getting at I said, this is my real hair.  She said “oh!!!”  How often do you go get it done?  I said, "I do my own hair."  I wanted to add idiot on the end of that sentence.  That was so unprofessional and offensive, especially coming from a GS-15.  Don’t assume my hair is fake because you decided to start wearing braids at the age of 65.   It’s obvious that you can’t discern natural hair from fake hair, but don’t assume my hair, or another woman’s hair, is fake.  If it were fake, it would have been longer than neck length.