This feels like a trick question. Like on one hand, Sherlock's giving him the opportunity to say yes, I'd do anything for you. And on other other, if he does say that - which of course he's going to - it leaves it open if Sherlock decides that is what he wants later.

'It's not a hard thing to arrange,' he says, smiling to hide the awful weight of realisation making itself known inside him. That this might actually be a Thing.

'If it was what you wanted, I could make it happen.'

But it's not what you want, right Sherlock?