In 'Innocence lost' X-23 got a letter from her mother. These are the contents:

Please forgive me. Even as I write the words, they ring so hollow. My mistakes… No, my choices… They cannot be undone, much less forgiven. How all this came to pass… and the truth about Weapon X. Had it ended there, would I be less a monster? Or more? Would I even know the difference? Of course I don't have to tell you about monsters. Your life is defined by monsters. Replicating the mutant genome proved difficult but rebuilding Weapon X seemed all but impossible. For every enzyme, for every codon, for every...