De ja vue ?? Seems like we've been here before. Does the Captain really not trust Jacob? I know that the two older brothers impregnated their wives before marriage, so maybe he is painting Jacob with the same brush. Hope that there is not a true chasm between Maryam and her parents, but I am pro Jacob.
Yes, the reason this seems so familiar is that it is discussed briefly in Manny's story (The Hunter) when the reason his dad, Jacob, was willing to call in the Coast Guard to save Manny's wife was because he'd been there & done that. Unfortunately (for you as the reader) you're reading these stories out of order. This romance does have a happily ever after, including a positive relationship with his in-laws. They just have to go through a few more trials first. See Chapter Sixteen of The Hunter: https://www.authorjuliespencer.com/chapter-a-day/sayid-family-saga-the-hunter-chapter-sixteen