But in between – oh, dear. The horizontal stripes made her bust look vast (and not in a good way – matronly was the word that sprang to mind). And for fuck’s sake, was she starting to develop a paunch? She supposed it was possible, with the ongoing eating and drinking of happy coupledom, and her increasing laziness when it came to exercise. She promised herself that she would hit the procrastinating on the head as she went back into her bedroom to change. Tomorrow she would definitely get up in time for her run.

Bella eventually arrived at Westbourne Studios at 1.30 p.m.

‘Yah, Daddy’s just given me and Jazz a mil each to buy a flat, but you can’t get anything decent round here for that sort of money,’ Sienna was saying into her iPhone as Bella walked into her time-share studio. ‘Oh, hi, Bella.’ She smiled and waved a thin, wafty hand.

Ludicrously overprivileged and good-looking, Sienna Sax-Hoffmann was studying History of Art at London University. She had told Bella that her father wanted her to have a bolthole for her studies, when ‘the Uni library gets too much. Dear Daddy, he can be so overprotective, but it’s rather fun having one’s own studio three mornings a week, don’t you think?’ Sienna only actually managed to get up in time to play on the Internet in her studio once a week, at most, but Bella didn’t hold that against her (well, how could she?). She found Sienna rather sweet. Perhaps it was because she was so pretty. Bella knew that with her artistic eye, she always gave people who were easy on it less of a hard time than those who repulsed her physically – male or female. She wasn’t particularly proud of this.

Sienna was about 5 foot 10, skinny as a catwalk model with an eating disorder, and pale as milk. Her naturally white-blonde hair cascaded in long waves around a coolly patrician face, all angular bones and huge, bruised, dark blue eyes. She played up her delicate appearance with fey, floaty, vintage garments, today looking breathtakingly fragile in a cream lacy maxidress, pearl choker (probably real) and jewelled flip-flops that showed off her narrow pedicured feet. Bella imagined that your average man’s unimaginative, testosterone-driven protective instincts would go into overdrive at the sight of her.

‘Hi, Bella.’ Sienna smiled as she put her phone down. ‘You’re late.’

‘I know. Never been much good at punctuality.’ Bella smiled back as she started setting up her easel.

‘I should be off then. D’you want me to pay you back for the extra hour? Not really fair for you to cough up for when you’re not here. Daddy can easily afford it …’ Sienna started and Bella laughed.

‘My lateness isn’t your dad’s fault, sweetie. Nope, this is my punishment for being the past-mistress of pissing about.’

Sienna laughed too. ‘Well, you’d better make the most of what time you’ve got left then.’ She looked out of the window and groaned. ‘Oh, Goooood. Bloody Josh is out there again. I swear that boy is stalking me.’