This might even be a reason that Spock works so hard to normalize relations between Vulcan and Romulus.
This makes sense.
Mr. Laser Beam wrote:
Adopted daughter, no.
In a formal sense perhaps not, although I can easily see Saavik being legally Spock's adopted daughter if you buy into the Saavik back story of being a half Vulcan half Romulan from a Romulan planet and Spock found her and took her into his family. That's all non-canon conjecture of course.
If she was only the equivalent of a "ward of the court," and Spock was raising her as her guardian, future marriage still creepy and wrong.
Now if Spock never once laid eyes on Saavik prior to her becoming one of his students, then we talking about something different.