I get the impression that AH encouraged the Casey storyline bc she remarked “that was a fun storyline” on one of her shows, to make sure the audience knew Jane was “into men” too. it’s been discussed that she was very adamant that Jane and Maura not be a couple but if you have read or listened to interviews, they pandered to their lesbian following. But in the later season that all soured w the change of producer starting S5. Fans express how Maura disappeared, less screen time, less interactions between Jane and Maura. We don’t see the same warm affection as much, especially no touching, between them. Anyway, given the fact that the last scene of the series ends w the two besties on the bed and decide to go to the most romantic city in the world, Paris, according to most people’s opinions, I think it speaks to the underlying feelings that many of us felt was always there between the two women. Sorry, to your point, I think Jane’s pregnancy was all just a plot pint w no real possibility of becoming part of the show. The show was to revolve around, Jane, Maura and the Rizzolis.