There's a sentence in the book I'm reading:
I'd been so busy thinking about myself and the shock of having a new sister, I never thought about what it would be like for Nana to have another grandchild.
Why not "I had never thought"? Both events (thinking about myself, never thinking about what it would be like) have exactly the same time reference, no?
Is there a grammatical rule that describes this? Can someone point it to me?
A similar question, but I'm not satisfied with the answer: Past simple, past perfect