Yes I gave birth to her!

We went to Lewis strawberry farms the other week. Unfortunately there were no strawberries left 'all brown' according to Lucy but blueberries and blackberries are still available. Lucy, who is shy with strangers, wouldn't talk to the lady serving us. The lady asked me 'are you the mom or the nanny?' I was shocked. Why would you ask such a question and why would you frame it in that particular way? I don't know anyone who has a nanny, do you?