Hmm.
Interesting.
My daughter was my mother's first grandchild. However, my sister's son who came along when my daughter was 5 is definitely her favorite. My son came along many years later and it's a miracle he and I even survived.
The kids are now 25, 20, and 16.
My nephew, the 20 year old, can do no wrong no matter how much trouble he's been in, no matter how many cars he's wrecked, no matter how irresponsible he is. He is the apple of my mother's eye.
My kids got good grades, never got in trouble at school, got citizenship awards, they are very responsible and very loving people.
Pffffft.
My mom is kind and gracious to my children. Never forgets a birthday or holiday, attends parties, etc.
However, anything my nephew wants, she gets it for him. She even paid for his driving lessons and his driver's license. Now, my sister is married, has a good husband and two incomes plus a beautiful home.
I've raised my kids as a single, working mother and she's never helped with any of that kind of stuff.
My mother isn't as verbally blatant as your mother, but my kids know how she feels about things. They don't understand it, but they've learned to not take it personally.
My daughter had a baby last May and my mom just adores her great grandson. She's really been there for my daughter. They live 10 minutes away from each other and see each other all the time. My mom would do anything for that baby.
I have to say that my grandparents favored me and I know it pissed my mom off and that might have something to do with why she favors my sister's kid.
I loved my grandparents so much and I showed it all the time. I sent them letters, I spent summers with them and always offered to help out. I was an easy, mellow, and affectionate child. My little sister was trouble with a capital T on two feet.
I have to say also, in rememberance of my Grandmother who has long passed, now that you bring this us, she and I just adored each other. We had a thing. We did. When she passed away, she had 15 grandchildren and 27 great grandchildren and she loved every single one of them and felt so blessed to have them all.
But, as an adult, and we talked about this, had we not even been related, we would have been the best of friends. We could have been two people who met each other in the grocery store and just fell in love with each other.
My aunts and uncles and my cousins all know that. It was NEVER to the exclusion or detriment of anyone else. Of course she loved her own children more than she loved me...but we just had a thing. We had a bond.
I was born and raised in California and she lived her entire life in Tennessee. I'm so thankful, even with that distance, that we were able to see each other as much as we did and even when we were apart, the miles meant nothing. My cousins lived so close they got to see her evey day. I was jealous they had her so close.
But, it was okay. Our hearts were connected.
I can't explain it. I had the same "thing" with my Grandfather. My mom's dad.
Sorry...enough about me.
I think that it is highly possible for grandparents to have special bonds with one grandchild. I also think it's highly possible for it not to be a blatant thing. For instance, when my Grandmother passed away at 94, the whole family was worried about me and if I was going to be okay. I come from a LARGE family.
I think you should talk to your mom about your concerns and just tell her you're worried that some of the things she says in the open might hurt the other kids feelings. It's especially hard because they ARE siblings and siblings can tend to compare themselves about things as it is. "She jump ropes better than me. She gets all A's on her report card, she always cleans her room, he's the funny one, she's the one that likes helping doing the dishes, he folds the socks better."
Kids do enough of that to themselves so it's important to try to curb obvious favoritism.
Bonds are bonds and that can't be helped and as a mother, you want all things to be equal. But, your kids aren't the same individuals and that's okay.
Your mom just needs to be careful with her words and actions while continuing to have her closeness with your daughter.
Your mom needs to make a conscious effort to show her adoration for each of her grandkids.
As kids are individuals, it's okay to deal with them "differently". Their personalities are likely different.
But, they all need to feel the same love.
I hope that makes sense and I wish you the best.