“Saturday” (post 2) by Ian McEwan (post 8): Protagonist’s wife’s late mother is named like a writer’s alternate personality

“Marianne Grammaticus was not so much grieved for as continually addressed…The death was too senseless to be believed — a late-night drunk jumping traffic lights… — and three years on…Rosalind didn’t accept it.  She remained in silent contact with an imaginary intimate” (1, p. 48).

1. Ian McEwan. Saturday. USA, Doubleday/Random House, 2005.

Added same day: I found nothing further of relevance.