Yhup, she's from both! She got knocked into an Alternate Reality when Brainiac's ship exploded and she was too close to the Quantum Core. The new AU had both her parents alive but with (or divorced from) different people, and she eventually came out as being from a different universe. She went through a Wormhole that had opened up "above" the Earth to try and go back to her own world, but found it a desolate rock with everybody living underground or having fucked off into space, with all her old friends and family either dead or missing. She went back through the wormhole to try and get back to the first AU where at least she still had friends, but the background Quantum Ripples that were still pulsating from Brainiac's wrecked ship in orbit tampered with the Wormhole and it sent her to<em>this</em>universe<em>and</em>back in time about 30-ish years. As I said; my plan for getting Nightstar to modern day Earth 2 is "Fun With Wormholes." It does get a bit Wibbly Wobbly Timey Wimey, but it's the comic universe. Weirder shit has happened. XD