Of Conversations and missed messages

I use the plural in the title with a bit of artistic liscence since I'm referring to one conversation on MSN with my dear friend Beki, where I missed a message and ended up being confused. Although I didn't have the foresight to save the conversation, this is roughly how it went. The vital information that I missed is in italics.

Beki: "I'm having dinner with my sister, brother-in-law and nephew tonight."
Me: "Aunt Beki! How sweet!"
Beki: "I know!
"They're staying at Disneyland.
"It was a total surprise for my nephew."
Me: "What, that you're his aunt? It must have been."