Because she's likely no longer alive? Or because if she were alive, she'd be Venerable, and unlikely to be up to the physicality of ambushing two high-level Paladins?
Age chart from the SRD: https://www.d20srd.org/srd/description.htm#age
Considering she was 'the kid' of the Scribble, I think it likely old age wouldn't have taken her yet. Though the point about the Soul Trapped or Bound Lirian/Dorukan being the ones to ultimately fill us in, is a good one.