I really like how Yuuki seems to have matured, and I too wish there was more Zeki action in this chapter :( (I'm reallllly hoping that eventually there will be a chapter where Yuuki actually bites Zero xD )
At any rate, I guess we all can't be that surprised by Yuuki or Aidou's reaction considering they had a conversation when she was human about how even in Kaname betrayed them they still would remain loyal. (Kaname turned Yuuki back into a vampire without her permission [is that betrayal ? ], Kaname killed Aidou's dad, both are as loyal as ever). Aidou's loyalty was put to the test (was that a flashback image, the one featuring the man and the little kid, of Aidou and his dad? :( ) and it seems like he's trying his best to accept the situation like his father, but I love how Yuuki tried to help him out too :)
As for Kaname, I'm not a Kaname fan, so I agree, I really hope next chapter Yuuki and Zero share more than "glances"--Zeki fans deserve more than that after all this waiting this entire arc! *grumble grumble* (LOL Now I'm starting to sound ridiculous... way too late for me xD)
I'm also interested to see what's happening with Sara soon--we haven't heard from her in a while either. Also the pureblood little kid who attacked Yuuki--he seemed interesting, and I have a feeling he'll play a larger role later on.