“When I said I had no choice about helping you, I meant it. There was no other option because you are the only option. I don't trust anything at the moment. But the one thing I am sure of, the one thing I do trust..." he paused for a fraction of a second, "is the way I feel about you.”

“Alex paused. 'I want you to be happy and I want you to be safe,' he said finally.'I'm both those things with you.”

“First I need to do something.’ He pulled me closer towards him until our lips were almost touching.‘What might that be?’ I managed to stutter, closing my eyes, anticipating the warmth of his lips against mine. But the kiss didn’t come. I opened my eyes. Alex had jumped to his feet.‘Swim,’ he said, grinning at me. ‘Come on.’‘Swim?’ I pouted, unable to hide my disappointment that he wanted to swim rather than make out with me.Alex pulled his T-shirt off in one swift move. My eyes fell straightaway to his chest – which was tanned, smooth and ripped with muscle, and which, when you studied it as I had done, in detail, you discovered wasn’t a six-pack but actually a twelve-pack.My eyes flitted to the shadowed hollows where his hips disappeared into his shorts, causing a flutter in parts of my body that up until three weeks ago had been flutter-dormant. Alex’s hands dropped to his shorts and he started undoing his belt.I reassessed the swimming option. I could definitely do swimming.He shrugged off his shorts, but before I could catch an eyeful of anything, he was off, jogging towards the water. I paused for a nanosecond, weighing up my embarrassment at stripping naked over my desire to follow him. With a deep breath, I tore off my dress then kicked off my underwear and started running towards the sea, praying Nate wasn’t doing a fly-by.The water was warm and flat as a bath. I could see Alex in the distance, his skin gleaming in the now inky moonlight. When I got close to him, his hand snaked under the water, wrapped round my waist and pulled me towards him. I didn’t resist because I’d forgotten in that instant how to swim. And then he kissed me and I prayed silently and fervently that he took my shudder to be the effect of the water.I tried sticking myself onto him like a barnacle, but eventually Alex managed to pull himself free, holding my wrists in his hand so I couldn’t reattach. His resolve was as solid as a nuclear bunker’s walls. Alex had said there were always chinks. But I couldn’t seem to find the one in his armour. He swam two long strokes away from me. I trod water and stayed where I was, feeling confused, glad that the night was dark enough to hide my expression.‘I’m just trying to protect your honour,’ he said, guessing it anyway.I groaned and rolled my eyes. When was he going to understand that I was happy for him to protect every other part of me, just not my honour?”

“You just were so cold with me. And the nurse’s outfit didn’t seem to make any kind of impression. Whatsoever. So I thought . . .’ I looked at the ground. ‘I thought you were only staying because you had promised me and then . . . when I asked you, you didn’t deny it.’ ‘You didn’t give me a chance to,’ he said, shaking his head at me. He took a step nearer. ‘And believe me the nurse’s outfit made an impression.’ He took another step towards me, so he was just a few centimetres away. ‘A very big impression.”

“I felt his other hand sear hot against my cheek. He bent his head, and in a voice that Jack couldn’t hear, said, “When you came down the stairs, and fell into me, that was the moment.” Then his lips pressed against mine.”

“Jack stares at me blankly. ‘A what?’ he asks. I choke back the laugh. ‘A boy. You know? A Y-chromosome holder? You don’t seem to notice them as much as you do the X-carriers.’ ‘What are you talking about?’ Jack asks, ‘A boy? She’s just a kid.’ I hesitate, wondering how Jack is only just doing the maths on this one now. ‘She’s seventeen. She’s not a kid anymore.’ Jack looks like he’s about to go all Incredible Hulk and burst out of his clothes before rampaging through the bar. He jumps off the stool. ‘If any boy ever lays a finger on my sister, I’m going to kill him,’ he says. Again I stare at him in silence, thinking of all the girls Jack has laid fingers and much more of his anatomy on besides. Poor Lila. If she ever wants to have a shot at a normal life, as in one that doesn’t require a vow of celibacy, she needs to stay in London.”

“My mission, which I chose to accept, is to infiltrate the enemy. Jack andAlex are the enemy. I pause, wondering how Demos defines infiltration.'Not that way', Alicia answers.”