Very interesting episode! It was kind of jarring in a lot of ways, but I get it.
Coming from the perspective of already reading the book, I know we are bracing for the big fight. I know that Claire leaves in the book, and has to be dragged back by Ian and only comes because she is told Jamie is dying. I always thought she would have eventually come back herself, at least I hoped so. I was actually shocked at that point in the book that she would actually leave. I think she just irrationally freaked out. I allowed it because the beauty of the characters are that they are not perfect, just wonderful. But I never liked this part coming up. I thought it showed the worst of both Jamie and Claire.
Anyways, that's for next episode (I'm a little worried about that cliff scene - Claire never in a rational mind in the book expressed that she didn't think they fit together any longer. Once she was of a rational mind, she seemed to be able to compare to Frank and understand why Jamie married Laoghaire and what their relationship was missing. But she seems to be speaking rationally on the cliff to Jamie who is standing, but was already shot. Who knows though - it's just a preview out of context - I'll wait and see what happens.)
But at this time in the book, there is no hint from any character (except Fergus maybe, I think? But not enough to tip of the reader ....) that Jamie is married. While all the craziness happens in these first few days where they are together in Edinburgh, the craziness seems completely unrelated to their reunion, and they seem like a team through it. I remember the scene in the book on the second night of their reunion where Jamie says he feels bad that Ian is worried about young Ian while he is laying with Claire, happier than he has ever been, and she agrees. I liked in the book that Jamie really didn't know exactly where Ian was, he just had more faith that he was fine and was less worried about him than his father was.
There doesn't seem to be any lingering doubts between Jamie and Claire after the first afternoon in the book up until the Laoghaire bombshell hits - which actually seems to come out of nowhere in the book.
I guess this is my main thought - the show is being more realistic - Jamie and Claire are acting more like a real human would act in this situation, which is good. All the characters are referencing the marriage and Jamie is worrying about it about, which is more realistic. There is more strain and uneasiness there about Bree and how she was raised, and that's understandable and makes sense.
BUT - I don't always like things to be realistic. It's fiction and as long as it's relate-able and believable enough, I mostly want it to make me happy.
So I get it, but I was hoping for a little more happy this episode than we got. I know next episode is going to be bad news, and I'm braced for it, but I kind of wanted to relax in the happiness for one more episode, and was expecting to, based on the book. So this was off expectation, which is why it jarred me a bit.