Supergirl In Training
Lena Luthor doesn't plan to have any kids. Or to get married, even, really. After the revelation that she is actually of Luthor blood after all, she's quite set on ending the family line with her and not taking the risk of any more drama.
Then Lorelai L. Danvers crashes into her life, claiming to be her seventeen year old daughter from the future.
(picking up after 2x12)