Another suggestion is Carol M's two stories. The second deals with the NKers, although the first is helpful to see the whole story. Both great reads.

In Sickness And In Health
What if Lois hadn't been switched for the clone until after the wedding? When Clark finds out that he's her husband, he takes steps to remove her from Deter's "care."

Till Death Do Us Part
A New Krypton story in which Lois and Clark are married when Zara tells them that she's already married to Kal-El. And there are dire consequences for everyone involved if Clark won't renounce Lois forever. Sequel to the author's In Sickness and In Health.

Cuidadora

"Honey, we didn't care if you were a Russian or a Martian... You were ours... and we weren't giving you to anybody." ~ Martha in Strange Visitor

"A love that risks nothing is worth nothing." ~ Jonathan in Big Girls Don't Fly