Willdun98:
What about if the character was spanked until they left home at 20 something and then returned, a sort of “never too old attitude “
Again, I think what time period you set this is important. Strictly speaking, any CP would now be illegal if you set it in the present. So if you want the story to be plausible then I think you need to set it in the past, even the recent past.
I was aware, in late nineteen seventies, of twenty somethings who accepted being spanked while I was also aware of twenty somethings who would absolutely not accept it. I have no doubt that the dynamic between the parent and child has a big influence. And part of that is the continuity. Most parent took the view that , certainly up to leaving school, spanking was 'normal'. After all the 'child was almost certainly receiving CP in school as well.
Thirties does seem to be stretching it though. In my own case, I would have been married with a professional career. I cannot see returning to a parent/child dynamic after that. But continuing from school age and while living at home , yes absolutely plausible because it happened quite often in the fifties to seventies and even into the eighties.
I cannot agree that spanking a child/adolescent would ensure they would never return home. The experience of millions of people would , I think , directly contradict that idea up to recently.
But also, and importantly, you are writing a story, so if it is enjoyable and roughly plausible then you will have succeeded.