Give her a kid.
>Kori was pregnant with child at the end of New Titans.
>She gives birth on New Tamaran and it's Dick's
>She's still married to General Phy'zzon and she and Dick weren't speaking, so she starts raising the child in secret on New Tamaran.
>Final Night starts and New Tamaran gets Sun Eater'd
>She grieves in secret, as everyone else who knew was dead.
>New 52/Rebirth/Death Metal multiverse fuckery meant the baby was realived, but in seclusion on the till-then abandoned moon that became New Tamaran, and was taken by the Psions for experimentation
>The child, now about six years old, somehow ends up on Earth