Bouchard and McGue (1981) wrote a review article (linked here) that summarized the correlations between relatives.
McGue asserted in a recent talk (that I'm not able to link) that he's not aware of any more recent work that has updated these figures.
However, I suspect that during the last 25 years something must have been done.
I am most interested in the figures for genetically related reared-together relatives, although data on genetically unrelated people reared-together and genetically related reared-apart relatives would also be welcome.
Bouchard, T. J., & McGue, M. (1981). Familial studies of intelligence: A review. Science, 212(4498), 1055-1059.