At the start of 1989, Bobby begins searching for her biological parents. Donald, after finding out his former sister-in-law, Morag Bellingham (Cornelia Frances) is Bobby's mother, visits Morag in hospital and asks if he is Bobby's father. Morag confirms he is but Donald wants this kept a secret. After Donald refuses to sell his house to the Macklin development at Morag's suggestion, she threatens to tell Bobby the truth. Donald remains unflappable and refuses to change his stance on the matter. After the truth comes out, Donald and Bobby have a shaky start but ultimately become close and she begins calling him "Dad".