From SAM at TWoP
"Progeny" is not about Lana's baby, but in fact it's about Moira, Chloe's mother. Turns out she pretended to be mentally ill in order to separate herself from Chloe. Why? Well Moira was irradiated during the infamous meteor shower way back when and has super brain powers of her own. She is taken away from the asylum by Lex who hopes to use her powers for his own gain. He forces her to use her powers against two of his captive superfreaks, Alexi, who can create orbs of pure energy and toss them like baseballs, and Davidson, who can walk thru walls.
Moira doesnt hide that fact she despises Lex and is able to mindcontrol Alexi and Davidson and tries to use them to kill Lex