I believe I do have a timeline of events that you might find revelatory.
Vanessa and Walter are on their honeymoon in France.
On a train journey to Lyon, Vanessa points out another traveller. She presents a number of theories about him based on what she has observed in his appearance and behaviour.
They exchange some ideas about the man, until Walter proposes a wager – whoever can tell the other most about the man after three minutes will win a piece of crystalised ginger.
After Vanessa accepts, Walter simply walks over to the man and introduces himself. He invites the man back to their table and relays what he has learned about him to Vanessa. He then eats the ginger.
Vanessa insists that Walter offers Jerry some fatherly words of wisdom. Walter tells Jerry an old trick of his – when you are feeling sad, saying “half a glass” to yourself will set your face in a natural smile.
She also gets a small plastic cowboy from the cracker, which she gives to her grandson, Benji. Benji is warned not to snatch by his mother, Hilla, who reminds him that “Level 3” behaviour is expected.
Deborah chooses to pull her cracker with her grandfather, Walter. Vanessa indicates to Walter that his cracker is on his side plate. Deborah wins, but questions if she has to rip up her hat. She asks if that tradition comes from them being a bit Jewish.
Hilla tells her that lighting the candles is because they are a bit Jewish, but that the hat ripping comes from the Wilkinson side. It transpires that the tradition dates back at least as far as Uncle Newt’s childhood.
As if to demonstrate, Vanessa enters the room at that moment. She says:
“Ah, Walter. There you are. Oh, and Deborah too. You look very cosy over there, dear, in that window seat.”
Vanessa uses indirect comments like this to help Walter place people and objects in the room.
Walter is watching a film. After a long time passes without the characters saying anything, he asks his wife, Vanessa, to help him.
Once the characters start speaking again, she leaves Walter to watch it alone.