I can't say mother because she doesn't deserve that title!!
She is a doting gm to all my siblings children just not mine. For example on my DDs birthday she didn't even get her so much as a card but took my niece out shopping for the day with a fancy lunch and a sleepover at her house on the day of my DDs birthday.
She complains if my DDs eat or drink anything in her house but all other grandkids have free reign on the fridge. It just makes me so fuckin cross. I've went nc with her before but my dcs missed my df so I've just kind of ignored her in their house.
I really want to have it out with her but it would cause world war 3 and because none of my siblings have the same problems with her I'll come off the worse. Any ideas anyone???