“You might have got the impression that there is a little bit more to Aunt Petunia than meets the eye, and you will find out what it is. She is not a squib, although that is a very good guess. Oh, I am giving a lot away here. I am being shockingly indiscreet." - J.K. Rowling.
If the reveal had been that Petunia was a witch ~ Several years after the war, Harry tracks his aunt down to confront her with what he witnessed in the pensieve.
It had never occurred to me that our lives, which had been so closely interwoven, could unravel with such speed. If I’d known, maybe I’d have kept tighter hold of them and not let unseen tides pull us apart. Never Let Me Go (2010), dir. Mark Romanek