Gonna be interesting to see how it's handled in the books as I continue reading. Only on page 93 right now but there's an early passage where Dexter says he used his charm to make her like him. Also says that La Guerta has advanced more because of politics than ability, which makes absolute sense to me now seeing the way the show's turned out.
The accuracy regarding her might change as I continue reading though.
By the way, does anyone else find the actress playing Morgan annoying as hell sometimes? I kind of find it hard to believe she'd make it as a cop, but hey, who knows.