Pag - the OP said she'd already asked why the MiL kept asking, and didn't get all the 'oh, it was a nightmare for me...' stuff, so she's asking how to take it from there.
I suppose my response is in the context of my relationship with my mother - I've always been fiercely independent (and she's known me for 45 years so she knows that), while she has tendencies towards being anxious, overprotective etc which have got worse as she has got older, and also since I was widowed and moved back to the UK.
We have a good relationship, speak every day and so on, but sometimes she slips into old habits, and when she has asked about/reminded me to do something I am perfectly capable of doing without interference for the 5th/10th/umpteenth time, I have to remind her, fairly bluntly, to back off a bit.
Works for us, but I can see that it might come across as excessively brusque in the context of other people's family dynamics.