Well, my thoughts are that I would not do any of those things.
I would not let my grandchild get to age 6 without asking if you would like some sort of break and enjoying their company.
I would not corner a 6 year old grandchild alone and make any sort of promises about anything without talking to my son or daughter first.
I would not consider taking one grandchild alone. If I could not manage 2 children I would make a plan where I could manage, especially as a first time. The only time I would consider having a grandchild alone is if the other had special plans that day like a birthday party with friends. I would not want to risk showing any favouritism and we all know or should know that children are sensitive to things like this and should be treated equally.
I have never been in this situation but I do feel you are right in your discomfort. I also get the impression they are wrong to try and treat you as anything less than you deserve. You are the parent. These are bonus adults that not all families get or have. They respect your parenting and your choices and that is that. You do not seem to be the sort to deliver those boundaries rudely. Stick to your guns.
Why am I losing my sewing mojo? Things seem more difficult now than when I was a beginner sewer!


