She and Uhtred always have each other's backs, though they're not romantically involved.
"My name is Uhtred, son of Uhtred. I was born an ealdorman of Northumbria, the rightful heir to Bebbanburg. But fate decreed I would be raised as a Dane. That was my life... Until my family was murdered."
In the book series by Bernard Cornwell, Aethelfled and Uhtred do become romantically involved after her jerk of a husband dies-and they remain lovers until her death-I just ordered the latest book in the series-hope it is as good a read as all the others have been...
:^) She's my aunt about 35 generations back. :^)