For some reason my parents deserted me and my siblings. I was six years old when they climbed into a car and without a word, drove off.
Our questions (to grand-parents) were met with silence. I mean, how upset can you get. I felt like I'd swallowed a grapefruit whole. I got used to the idea they were gone forever after a week or so. You run out of tears.
Several weeks later they returned with some excuse but it made no difference, As far as I was concerned, they were dead.
I look after my mother out of duty not affection. She's in hospital right now and wondering why the staff seem to avoid her. I would suggest that constant demands, questions and complaints might have everything to do with it.
She's terminal. But from my point of view its just postponed since 1967.