Dang. He can clearly see she's lying to him, and he's really going to be a mess when they tell him the truth, if they get to that. It's a complex situation, and you're handling it beautifully. He's clearly predominantly William, but there are shades of Spike inside, too. Sort of the reverse of how he is as Spike, maybe?

Really loving this, in a nail-bitey kind of way. ;)