I guess that is the other arguments isnt it Blanchie.
Will they care for your bub they way you want them to. ie respect your wishes.

I know when my nephew was 12 months old and we would be at the IL's and MIL would say oh cant he have a little chocolate... he wants it.. and bubs mum wasnt there and i know the answer was no! i was thinking i wonder if she would defy my wishes when i am not around... so hard isnt it

p.s dont get me wrong MIL is very loving and caring and does so much for this little baby it isnt funny but as a new mum to be you get so nervous about the little things!