SIL and I had babies a month apart and MIL favours SIL's. They're both boys (mine is oldest and the first grandchild). But MIL glazes over if I talk about DS, then comes up with something SIL's DS does. It seems a chore to her to pay attention to my DS and things he can do aren't noticed til SIL's DS can do them - and then the comparisons start. My least favourite comment so far has been 'who's got the biggest smile', but now SIL's DS is heavier than mine and the comments are starting (can't I give him a bit of formula, etc). I hate that she won't see DS as a person, not something to be compared with SIL's DS.
I feel that she's taking out her dislike of me on DS and that's not fair. Anyone else in this enviable position?! Do I just grin and bear it and thank my lucky stars my mum's lovely?