 She had been sworn by the Cassadines to leave him behind and keep his existence a secret as a condition of her release, to protect Luke from their wrath.Nikolas saves Lulu's life with a bone marrow transplant, but Luke and Laura's marriage is destroyed by the revelation of this secret.Around this time, Luke visits a bedridden Helena, gloating at her condition but vowing to have his revenge when she is well enough to fully experience him murdering her.