"It was early for the first snowfall, but Jack wasn’t complaining."
Even without the M/H conversation ending this current chapter, I suppose the early snow is a harbinger borrowed directly from canon: Warning that their secluded time apart from the rest or the world is drawing to an abrupt end.
And that abrupt end will have something to do with Madrigal......
Since we haven't had the Ortiz story yet, I'm beginning to think we'll not learn what happened until Madrigal actually catches up with Ennis and Jack. He loved tormenting Jack, reminding him of Ortiz at that wedding. Madrigal surely would be thrilled to dish the story out to Ennis in all its horror with Jack as helpless witness, once he finds out what E & J now mean to each other.
As long as I know there will be a happy ending, I'm not at all adverse to lots of angst. And I sure can see many possible extremely angsty and near heart-breaking scenarios in the immediate SoG future, - in which E&Js newfound love will surely play an important part and be tested and tried.....