"This is for you."
Cassie reaches out for the small box that Johnstone presses into her hands. For an insane moment she thinks it might be an engagement ring, but when she opens the box, it's a pair of diamond earrings.
"They're beautiful," she says, in her best awed voice.
"Put them on for me," he instructs. It's an order, not a request. She carefully feels for the holes in her earlobes and slips the diamonds in.
"They look good on you, Lexie," he says and something in his voice makes her look up, at his expression. He likes her, she realises. Really likes her. She almost feels guilty for a second, then she remembers who Johnstone is, what he does.
"Don't take them off until I tell you to," he says. He puts his hand on her knee and runs it up her thigh. She closes her eyes and thinks of the moment when she'll be able to arrest him.