And from our Discord channel, BlindPassenger identified this as New Birth by Jenni Debbage, part of of the Kent Family Series.

http://lcfanfic.com/author_d.htm#DebbageJenni

wave Michael

Join us on the #loisclark Discord server! We talk about fanfic, our favorite show, life, and more! (It’s almost like the IRC days of old again!)

I go by Michael on the Archives.