[He stands and walks behind him, putting a hand between Leo's shoulder-blades and rubbing absently]

Well duh. You have to apologize. And not that 'I'm sorry you misunderstood my meaning' crap. Or 'I'm sorry you got upset even though honestly it wasn't my fault'.

Just a straight forward 'I'm sorry I hurt you.' No explaining, or you trying to justify any of it. Got it?