I feel as though this is something all stay-at-home parents go through.  As a new stay at home mom, when people ask me what I do, I definitely hesitate before I tell them and I typically qualify it with the financial rationale that as a teacher, I would actually lose money if I had to put two infants in daycare.  I also feel a burning desire to tell them what I used to do, as if to say, "I wasn't always like this."  And that's with me fully believing in one parent staying home and loving that I have the opportunity to do so.  It's definitely an identity crisis causing job... :)