Young justice Superboy's mother
Lex Luthor taunts Superboy with the knowledge of who the other half of his DNA belongs to.
Superboy secretly meets with Lex hoping to find out who his other DNA doner is, Lex taunts him by saying it was only going to be his and Superman's DNA, but beacuse of biology he had to have a woman's DNA.
So Superboy is the biological son of Lex Luthor, Superman and an unknown woman.
Superboy is devastated that he shares DNA with Luthor, but he is also extremely curious to who his mother is.
Superboy tries to find out himself but he wasn't able to, so he goes to robin for help.
And with robin's help they discover that Superboy's mother Is a normal human, who lives in star city.
But what they don't know is that his mother is not a normal human at all, she is one of the first meta Humans and her powers is regeneration, Super strength, speed and enhanced Senses. (Like a DC and female version of wolverine without the claws)
She has been alive for hundreds of years, and used to be a hero/Vigilante.