My MIL is not very interested in the kids, does the whole OOh I love my grandkids act for everyone, but doesnt really look at them ( still doesnt know the difference between the twins ) will only touch them and hold them til they start to move. ( 6 months or so)
BUT I made it very clear from the start that she was to treat us all with politeness if she wanted to have any contact ( had issues pre kids) so she is always "correct" and attends every significant event. ( has never let them kiss her on the mouth though IYKWIM!!)

My family make up for it in spades though!!!

Good luck, I recommend standing up for yours and the babys rights, and demanding the respect you deserve!! They dont need to love oyu, just respect you, dont let them turn you into a victim, a sitiing down and talking would help clear the air.