First and foremost: Do everything you can to prevent tensions that can build around you and the parent that has custody of your grandkid(s). It can be really hard sometimes to keep your comments to yourself. I always advise grandparents to ask themselves “How much do you want to pay to be right?). An additional benefit to this approach is that the children don’t get caught up in differences of opinion between you and their parent(s).
Change is hard on everyone. I
Having said all of that I want to reemphasize that at any time you may see evidence of or even have a suspicion of the children suffering emotional or physical abuse it is your duty to do what ever is necessary to confront this quickly. The best way to approach any situation like this is by contacting The Social services agency in the state where the children reside. It is a good practice to ask them for anonymity if possible since this tends to make the perpetrators defensive, but this fear should not be a deterrent to the protection of the children.
Being steady in your love for your grandchildren is the right thing to do on soooooo many levels. It is also the one thing that increases your odds of having a long and mutually beneficial relationship with these wonderful little miracles we call grandkids.
My hope for you is Great-Grandparenting! GrandpaNEIL