[ebonnafoux]

> Who takes care of the nannies kids?

Nannies take multiple children (up to 4 here in France) at the same time. So he/she can take his/her own.

[scottyah]

Also they only need to be nannied for a couple years, so there's like 48-40 other years of their lives where they can spend the bulk of their focus on the kid they're nannying instead of their own.