Milly had answered yes to all ten questions and had decided right then and there that she needed to do something about it. Her tendency to say yes was the reason she felt pressured all the time. It was the reason she lay awake at night, stressed and hyperventilating with her to-do list racing around her brain. Her inability to be assertive was the reason she never felt able to call out Richard’s unreasonable behavior. (He’d already humiliated and divorced her, so really what more could he do?) She didn’t know if the way he behaved was a hallmark of ex-husbands generally, but she knew she wasn’t handling it well. It had to stop. She had to change.

She was too busy to take a class in person, largely because of her inability to say no, so she’d enrolled for an online course and for two weeks had spent an hour every evening exploring ways to be more assertive. She’d learned about boundaries, about the importance of standing up for her rights and respecting other people’s, she’d filled out worksheets where she’d tried out different ways of saying no. Assertive, but not aggressive. Use the I word, not you. When you do (fill in particular behavioral aberration here) . . . I feel (describe, without swearing, how it makes you feel) . . .

She’d passed with top marks and thought that maybe this would be a new beginning. And then her phone had rung.

The name that flashed up was Sister.

Milly had stared at it for so long it had stopped ringing. But it had immediately started again, and this time she’d answered it, even though part of her didn’t want to.

It wasn’t her sister, of course. She didn’t have a sister, but when Nicole’s career had taken off, she’d insisted that Milly store her number under a different name. It had felt exciting at the time. Clandestine. It had made her feel special, because all of a sudden everyone wanted a piece of Nicole, and Milly had her number in her phone.

They’d been in their early twenties, but even at that tender age their lives couldn’t have been more different. Milly was married to Richard and had just discovered she was pregnant. She spent her days helping her mother run the family business, a small but exclusive resort of lakeside cabins nestled close to the water in the beautiful Lake District.