Well - I think it was Atia saying it, but the woman on in the wedding scene had lighter hair - like Octavia has. Meep!And possibly sob!

Indeed! I would think it is some kind of trickery on Octavian's part. I am full with dread, though because I knew from the very beginning that Octavia and Agrippa are not going to marry, I think I can do with stolen glance, secret meetings and forbidden love. :D