spoilers Grant and Marian
I'm a little confused. The scene with them in bed together...sort of startled me. I mean I figure they were gradually developing a relationship but that happened rather fast! Did Grant really have sudden affections for Marian or was it just part of his ongoing plan in wooing her so that Aubrey could go back to Meadowlake? Marian's line about "Can we just pretend" (paraphrase) suggests the latter, but the actual short story gave me the impression there was a bit of sexual attraction for her.
I'm not sure if it's supposed to be ambiguous on whether Grant is truly making a sacrifice (he certainly enjoyed the sex =D) or rather instead him and Marian just realizing they had to move on with their lives and make the decision that's best for their spouses. I presume they move in together, but I don't know if their relationship will be "pretend" or a newfound companionship. BTW I thought an ending scene of Grant and marian sitting together watching from afar aubrey/fiona reunited would've complimented nicely and bittersweetly (perhaps shown just before the snow tracks and final young Fiona frames)- though this would be based on speculation and maybe would have felt tacky.
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"...future events such as these will affect you in the future"
-best movie evar