The dynamic has got to be way freaky. I can't imagine having a nanny, myself. Part of why I was so annoyed at her article -- she seemed to be extrapolating hugely from a very small sample consisting of herself and some friends.
I once went on a weeklong retreat/ vacation thing with several families, one brought their nanny -- she had the same name as the mom, and looked like a younger version of the mom, and the whole thing just made me incredibly uncomfortable. I was getting baaaad vibes. Sure enough, the dad ran off with her about 3 months later.
At any rate, I took all of those points well, about how fraught that must be, on many levels.