IMHO yours is not a nanny but an au pair
That is what you called her when she arrived IIRC
She is earning an Au Pair wages rather than nanny wages IIRC
She is working nanny hours though
She is a specialist in food prep
NOT childcare
So I feel you have had what you paid for
IMHO there is no better job than looking after children and seeing them develop
Teaching them to make a tower of bricks
Do jigsaw puzzles
paint a smiley face
catch a ball
etc etc etc.............
I think it is the best job in the world
But you obviously don't so we will never see eye to eye on this subject
IMHO
The rewards are more than money
smiles from children are worth more than money
But please be fair and trust her judgement
BUT please show respect and value your next au pair
Take yourself out of the situation and ask if you would want to work for you or want your DD to work for you
IYSWIM
Perhaps get someone who has done the job before rather than from nutrition degree
They may enjoy playing with your children then
and not want to move on to a "more exciting job"
There is nothing more exciting or important than teaching and helping the next generation to grow up to be happy, kind, friendly people is there?
I would be very interested if you could honestly say that there was any other job as important as looking after children
THEY ARE OUR FUTURE