Stealthy Giraffe wrote...
With my first playthrough of LotSB that scene stuck out for me. I had a bit of a "huh, well that was interesting" kind of moment when Shepard walked away from Liara like that. I believe, as others have said, that the two of them are uneasy with each other and unsure where the relationship stands. But along with that, my impression was that Shepard was still slightly put out by Liara's refusal to talk about the relationship on Azure. She wanted to talk then, but Liara didn't. Now Shepard believes the ball is in Liara's court and it's up to her to make the next move/decide when she's ready to talk. Shepard's delivery of "Fine" on Azure seemed filled with hurt, disappointment, frustration and a bit of anger and I think that bled over into this encounter. She wasn't deliberately trying to hurt Liara (because deep down she knows that she has been through a lot to get to this point, and at the end of the day Shepard really just wants to hold her), but the irrational part of her mind wouldn't allow her to completely dismiss Liara's earlier actions either. She needed to see if the other squadmate was ok, so used that opportunity to give Liara (and herself) some time.
Indeed!
This is an element of LotSB's romance development and progression that I have also noticed, and it's an interesting shift in the dynamic of the relationship. Back on Illium, Shepard was the individual who was uncomfortable and uneasy regarding the current status of the romance. She even angrily demands that Liara speak to her, and dismisses her quest as a "petty vendetta". At this point, Shepard is the one who feels hurt and unsure. She is in need of clarification regarding the romance.
However, interestingly enough, it is Liara who then seeks reassurance on board the Shadow Broker ship, after she has taken control of the network. Liara is obviously fearful that too much time has elapsed since they first fell in love, and her anxieties are based on her fears that the pair of them have drifted apart, and have become different people. At this point, it is then Shepard's responsibility to reassure her, and demonstrate to Liara that their love is stronger than ever with a passionate kiss.
It's an interesting development of the romance, and it's worthwhile to note the manner in which the relationship dynamic shifts during the course of LotSB's events.