Successful people are boundary-benders, boundary-breakers, and maybe it is Becky who should be taking a lesson from this rather than sitting here in judgement. She has so much to learn. She aches under the weight of it, aches at how childish she still is.

All these thoughts ricochet off the sides of her, like a ball in a pinball machine.

She considers for the hundredth time how, with the kitchen lights behind her, she must only have been a silhouette. How she turned and ran so quickly and quietly that perhaps if they were drunk she’ll be remembered as something that couldn’t have happened. A shadow in the corner of the eye, with nothing there on second glance. She was never there. If he asked – and why would he ever ask? – she would look blankly back and deny everything.

It is none of her business how two people have sex. Some people like to dress up. Some people play rough, hold each other down and tie each other up by the wrists, silence and hurt each other. She knows all that. She’s not completely naïve.

At five in the morning, and with just two hours left before it’s time to wake Maisie for school, Becky admits defeat and leaves her bed, padding quietly to the kitchen to make a pot of coffee. Maisie will sleep through the kettle whistle, through the smell of coffee, through all of it. Maisie rarely dreams. She sleeps like a child whose days are straightforward, which is precisely how Becky has laboured to arrange them.

Becky breathes in her home and the smell of washing powder and the ghost of last night’s chilli and tries to calm the thud-crack in her heart. She looks around her small kitchen and at all the boundaries that surround her in her old East London maisonette; at the low ceilings and narrow rooms, at the double-glazed, triple-locked door that leads out onto a paved patio. At the window grills that slide across and meet in the middle. At the moose-headed coat hook in the hallway that holds her black lycra running top and the pair of creased and dusty wide-legged trousers she’d once worn for weekly self-defence classes at the local gym.

At first, what she learnt there made her feel safer than any triple-locked door. She enjoyed making a fist in a boxing glove so her wrists didn’t snap and her tendons didn’t bruise, and how to deliver a punch with speed and precision. She had felt reassured and emboldened by the tight wrap of the gloves around her wrists and how they made her arms feel bionic, almost not her own. She had enjoyed the feeling of strength return to her body.