score:3
Several Second Temple documents — and not just the Christian tradition — reflect the hope that God will re-establish the Israelite monarchy. This was often based on the promises God makes to David in 2 Sam 7, which state that his son Solomon:
This makes excellent sense of the fact that the High Priest, in the passage you are asking about, moves directly from questions about Jesus's relationship to the Temple to a question about whether Jesus is God's son: both questions were attempts to determine whether Jesus saw himself as a fulfillment of 2 Sam 7. So when the High Priest asked if Jesus was God's son, he meant, “do you think God has adopted you as a son to rule over his people Israel, like he adopted Solomon as his son?”