The diner was a ribbed silver caravan with TRY OUR FAMOUS CHILI AND TACOS in red neon outside. It was an offer that Rachel could not resist. A green neon chilli flashed cutely next to a yellow sombrero.

When the giant oval plate arrived loaded with chilli-flavoured minced meat, refried beans, guacamole, and sour cream, topped with bright orange Cheddar and accompanied by speckled ochre tortilla shells, Patrick lit a cigarette in the hope of drawing a veil of thin blue smoke over the pungent heap of spicy food. He took another sip of insipid coffee and sat back as far as possible in the corner of the red plastic bench. Rachel was clearly a nervous overeater, stuffing herself before he stuffed her, or perhaps, very persuasively, trying to put him off sex altogether by wreaking havoc on her digestive system, and saturating her breath with the torrid stench of cheese and chilli.

‘Uh-hum,’ said Rachel appreciatively, ‘I love this food.’

Patrick raised an eyebrow slightly but made no comment.

She piled the chilli into the tortilla, smeared some guacamole on top, and patted down the sour cream with the back of her fork. Finally, she took a pinch of Cheddar between her fingers and sprinkled it on top.

The tortilla flopped open and chilli flooded onto her chin. Giggling, she lifted it with her index finger and forced it back into her mouth.

‘Delicioso,’ she commented.

‘It looks disgusting,’ said Patrick sullenly.

‘You should try some.’

She stooped over the plate and found ingenious angles from which to snap at the collapsing tortilla. Patrick rubbed his eye. It was itching wildly again. He stared out of the window but was drawn back into the arena of its reflections. The tulip-red bar stools on their chrome stems, the hatch into the kitchen, the old man hunched over a cup of coffee and, of course, Rachel like a pig in a trough. It reminded him of the famous painting by whatshisname. Memory getting burned out. The terror of forgetting everything. Hooper . . . Hopper. Got it. Life in the old dog.

‘Finished?’ asked Patrick.

‘They make a great banana split here,’ said Rachel saucily, still chomping her last mouthful of chilli.

‘Well, don’t restrain yourself,’ said Patrick. ‘Will one be enough?’

‘Don’t you want one too?’

‘No, I do not,’ said Patrick pompously.

Soon a long glass dish arrived on which scoops of chocolate, vanilla, and strawberry ice cream were bracketed by the two halves of a banana, buried under rippling waves of whipped cream and decorated with beads of pink and green candy. Red maraschino cherries ran down the centre like a row of clown’s buttons.

Patrick’s leg twitched up and down involuntarily as he watched Rachel exhume bits of banana from the mound of brightly coloured creams.

‘I’ve given up dairy products,’ she said, ‘but I allow myself these binges sometimes.’

‘So it seems,’ said Patrick stiffly.