1. Nope, it's my first time playing the game. I guess I'll be missing out on a lot of nostalgia, but on the other hand I'm more mature and can understand plot probably a lot better than I would as a 12-something year old. Unless they've changed it in the last 2 months, which I doubt, I couldn't possibly be having this problem.
2. Unfortunately I've locked myself out of SoR.
From what I see, there are either some mutually exclusive options or I've just skipped a few dialogues for no reason. https://youtu.be/B_tUDGJYewo <---- I skipped the shock collar and wedding stuff, it never popped up, I just got the "I'm here for the long term" instead ( https://youtu.be/B_tUDGJYewo?t=1930 <---- I've marked the time) just after the Hutt revenge conversation together with her sister. So to sum this up, I think I just got one of the other dialogue options, but it's still weird how after saying "I'm here for the long term" she instantly becomes my wife without any dialogue about that lol.
3. I mean, you can't reverse choices in this game, so I doubt they can do anything, even if it's just the dialogue.