I stand corrected

Yesterday my alarm bells were ringing loud, no blackbird in the nest, on the egg!.
Today she was back and produced a second egg.
So, I had a look (or two) in the internet and see: they leave the nest between every time they lay an egg, to keep enemies away. Only after the laid is complete they actually start breeding! And since she was away again, I assume she will surprise us with another egg. Blackbirds lay between 3 and 6 eggs.
I will keep you posted, you can count the eggs on me.