First World War and convinces himself that she is his sweetheart. She decides, with some encouragement from Mrs Patmore, to allow William his fantasy to boost his morale in battle and gives him a photo. After William is severely injured saving Matthew Crawley during the Battle of Amiens, Daisy agrees to marry him to give him some happiness in his life but is widowed six hours later. She resists claiming her widow's pension as she thinks it wrong to claim money for marrying a man that she liked but would have not married under normal circumstances. William's father reaches out to her and Daisy tries to tell him about her guilt but he refuses to listen. The older Mr Mason later explains to Daisy that William was his only surviving child and he had realised that William married Daisy not just because he cared for her but so his father would have someone to keep company. Upon learning that her parents are dead, he offers to take her under his wing as a surrogate daughter, which she accepts, though reluctantly at the outset. Eventually, she does grow close to him and learns he wishes to name her his sole heir. Daisy has a close relationship with Mrs Patmore, the cook, which is frequently more mother-daughter than two servants working together. At other times, Mrs Patmore becomes flustered and takes her frustration out on Daisy. She is also entrusted with teaching Lady Sybil how to cook, something which the pair enjoy. In 1919, she asks Mrs Patmore if, after many years in service, she can be promoted from kitchen maid to assistant cook and Mrs Patmore agrees to ask Mrs Hughes if the budget can support promotion for Daisy. In the third series, she grows to like Alfred but resents Ivy, the new kitchen maid, who steals Alfred's attention. By series four the love triangle is getting nowhere until Alfred decides to leave after catching Ivy kissing Jimmy. Daisy is devastated and blames Ivy. She decides to avoid seeing him when he comes to say final goodbyes, but her father-in-law, whom she goes to see, convinces her she must say goodbye to him. When she does, Alfred apologises to her, regretting being blinded by his infatuation for Ivy and failing to see how good and true Daisy had been to him. Daisy admits she loved Alfred, but that is gone and