Ok, so now Hanna & Booth both know that Bones has strong feelings for Booth. And while I think Hanna took it a little too well, I think I have a possible idea why. And while this is more of a hunch than anything it at least ties some spoiler info into all of it...
Spoiler (Click to reveal/hide)
We know that a 'Sniper' arc is coming up, and what if... Hanna gets killed/shot by the Sniper??? Then Bones & Booth end up working together to find him(Or her) and end up getting back together in the bibical sense???