Children say all sorts of things, even though sometimes seemingly outrageous, it is because of that it is often hilarious. My granddaughter once informed her great grandmother that 'she would be going to the angels soon', we all laughed. My grandsons also have said all sorts of things, they are 3 and 6 and the 3 year old regularly tells me he is not my friend and he is not playing any more (especially if I sit him on the naughty step). The 6 year old comes out with all sorts of stuff, the other day he told me 'my tummy was very big' I could not help laughing because 'out of the mouth's of babes'.
I sometimes feel prickly about the 'other' grandmothers, I put that down to my feelings, we can all get very possessive about are little darlings, I include all grandparents in conversations and ask how they are all doing, that way our grandchildren are not dragged into adult feelings, especially the little ones, they easily pick up on bad vibes. Keep laughing and all will be fine.