Concerning the royal heirs.
Sparrow could never really let go of being a living weapon, even after Theresa took the Spire, so they just kind of kept to the hard life of Herodom. After losing their first family to Lucien they didn't plan on having another, but eventually Logan and Rose just sort of happened; it was before Rose's birth that Theresa decided to show Sparrow the future, and even knowing they were damning their children to the same fate they had to endure, Sparrow just... accepted that.
They died around 44 and spent their final years consolidating the newly-united Albion. No one ever found out who the kids' other parent was and Albion never had any monarchs-consort; but the first members of the royal council and those closest to the king were Reaver and Sir Walter Beck, and Sparrow picked them to serve as Logan's regents when he was crowned after their death, at 14.
