I'm sure that Tim will remember his step mother's death, he was an adult when she died and Faye certainly remembers. There could be ex-girlfriends popping up to give evidence, though - there were a few years between Tess's death and Geoff getting with Yasmeen
Darcy, no, Tess died before Faye came in to the show. Faye remembers her grandma and told Anna Windass that she 'died of a broken heart' when she first appeared in the show. Tim had abandoned Faye and her mother when Faye was 2. Her mother died of a heroin overdose after Faye was taken in to care because of neglect. Neither Geoff nor Tess was able to care for her and we know nothing of Faye's maternal grandparents but Faye was aware of Tess's death.