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But was sort of struck by the idea of Lois returning after Clark has married Lana and THEN getting a crush on Superman (who may have been co-created by our Lois) Has that been done?
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It's not quite the same thing, but this did remind me a smidge of In Any Universe by Pam Jernigan...Lois never went to the Congo, and Clark shows up with his fiancee, Lana. It's worth a read.
Thanks for the mention! smile Actually, ML Thompson's "The Other Woman" might be a closer match. Though I'm not certain there's ever been a story in which Clark is both Superman and married to Lana. The two seem somewhat mutually exclusive...

PJ