My parenting was different from the way my DIL is bringing up my two grandsons but that is not usually a problem. They are happy little boys.
Background; I had my 4 kids in the 1980s/1990s. I read the Continuum Concept and never looked back. We co-slept. Breastfed until natural weaning. Home educated second youngest until ready for school.
DIL was given lots of help by me to b'feed ( asked for) which she does diligently but not sure she really enjoys it. She sticks rigidly to meal & nap times which we have to come home for. I have always stuck up for her when other family members have rolled their eyes at this because they seem happy in the routine. I will occasionally get a lecture - for instance I once kept eldest out past meal time because we had stopped at a cafe. I texted not to worry about lunch but was told in no uncertain terms to come back immediately
I visited a few days ago in their new house they've just moved to. I was sleeping in the dormer bedroom opposite my 3 yr old grandson. He arrived in my room about midnight having undone his sleeping bag, climbed out of his cot and come through. It was cold in the rooms (corners often are) and his hands and feet were like ice. I know they don't like co-sleeping so I grabbed the duvet and took him downstairs to snuggle on the couch and warm him up. Just did not occur to me to put him back in his cot like that.
To cut a long story my son came through and said, I'll take him Mum. Suspected I'd done the wrong thing as he was quite short with me.
Got a lecture in the morning from DIL as though I was a small child myself and I'm afraid it went badly. After listening a bit I said "of course I'll do what you want in your house but my parenting was different to yours so it can be a bit difficult for me to know what to do here. I'm not 12 yrs old and I've brought up 4 kids. Can I not be the Grandma that's a bit different because after all, you're the biggest influence on them ( that's a precis of my side of it)
She was really angry and said she can't see how I can continue to visit and she doesn't know what else she has to do...
You get the picture?
I am heartbroken. Don't know at the moment now to fix this. I apologised and said of course in your house, your rules but there's something broken now