I have a friend who is working as a nurse in age care but pretended to be a school teacher..?

she Is actually convinces everyone that she is teaching in a school.I know she a full time nurse as one of my friend also proudly working there..I don't know why she is trying to hide that she is a nurse. I feel so sick to hear she is talking about teaching terms all the time. How can I tell her to stop boasting and to be her self...