I'm Sicilian and Italian on my mothers side. My grandmother is Italian and my grandfather is Sicilian. Well, I have relatives that still live in Sicily, (Augusta, Sicily to be exact) and I met them about 4 years ago. Well they were the ones who were in my dream. Now, I know some Italian, but I cannot speak it fluently. Any takes on why I had this dream? I was like speaking the language and understanding it so perfectly in my dream..
Oh, the same thing happened to me a while ago, except in Korean. I am absolutely nowhere near close to being fluent in Korean (I started learning in February), but in my dream I was speaking it fluently. I think it's because I was studying really hard that day. Maybe you were doing something pertaining to your relatives or the Italian language earlier that you had a dream about it. If you subconsciously think about something a lot you have dreams about it.
It means you're verrrrrrry close to being, if not already fluent, my dear. That's a good thing!
"Maledizione! Sei quasi fluente di italiano!" would my reaction, haha :)
Understand a language when spoken is the hardest component (the others being reading, writing, and speaking).