Mam would expect visits or to be asked around to her grandkid's house. She would text or ring to ask when she was seeing them next or if she felt she wasn't being included enough she would hold a stand off and see how long it took my siblings to contact her.
That can go on for months.
My MIL hasn't ever done this.
Granted we are living in different countries but even with regards to phone calls or skype, she never asks but is always available when we have the time to make that call.
As of February this year she has a new grandchild. Her only daughter had a baby and I hear she's been really involved with him. Going over to her daughter's house every second day to help out with whatever needs doing.
I wondered if maybe she'd be feeling a little more content now she's getting a baby fix in real life rather then over skype and photos but she's actually missing our children more now. Probably all the more aware of what she's missing out on.
Here we are with two grannies only dying to get the chance to be great grandparents and we are denying them that chance, yet some have grandparents on their doorstep that just don't don't want to be pestered with their grandchildren.