Well, you know, the whole "kryptonians can't get earth people pregnant" smokescreen is largely to protect the kids since they're, you know, kids. Once they've grown up and into their superpowers it won't be such an issue. Still, I'm looking forward to this explanation Nan's got in mind...
Great story, Nan, and I'm sad to see it end. I hope you'll have something more for us soon, in this universe or any other
PJ