Grandaughter being alienated

Not enough information. What has she said to make you think that you are being blamed?

Hello MyHeart and welcome to GN.

Try not to worry about this. As Bluebelle has said, your GD will be facing a lot of changes within herself and her life at the age of 10, and what she says is probably due to her trying to make sense of how her life is.

If it had been the case that you were being held responsible for the break down of your son's relationship, it's very unlikely that you'd have been able to have had a relationship with her for the last 10 years.

Carry on being the GM she knows and loves and enjoy the time you get to spend together.

Sad situation but are you sure you are getting it right I wouldn’t read too much into it unless there’s much more showing up than comes across in your post. 10 years olds are going through changes in their lives, hormones starting, waiting for school changes coming up etc Personally I would have thought if the mother or family were on a bit of a witch hunt it would have happened around the break up time not ten years later
I would say carry on being the gran/Nan you ve always been and as she gets older answer any questions she asks, totally honestly

It’s always so sad when grandparents are blamed. However, I am very pleased to hear that you have continued to have a good relationship with your little granddaughter. She is only 10 years old and is probably a little bit curious. Just give her all the love you can. Don’t explain too much. I am not very good at giving advice. Someone will come along soon with the right answers and advice. Good luck !