Melissa was once going out with Gordon Edgley, before he introduced her to his younger brother Desmond, with whom she fell immediatley in love. In his will, Gordon even says that Desmond 'stole' her from him. Later she married Desmond and had two daughters, Stephanie and Alice.
Together with her husband and daughter she attends the funeral of her brother-in-law Gordon. Later Melissa goes with them to Fedgewick, Gordon's lawyer, to attend the reading of his will, in which he left her and Desmond his villa in France.
After it is revealed that Stephanie inherited Gordon's estate, she goes along with her to the house checking it. When they want to go back home, they realise that their car broke down and Melissa has to call a mechanic. Because Stephanie doesn't fit into the mechanic's truck due to insufficient seats, she has to leave her alone in Gordon's house, but promises she would later pick her up when the car is fixed. But because the bridge to the estate gets flooded she is unable to pick her daughter up so that Stephanie has to stay alone in the house.
Melissa makes with Beryl plans for the Edgley reunion, when Valkyrie comes down for breakfast. At the reunion, Melissa tries to escape with Valkyrie, not bearing the Edgley's behaviours anymore. But because Valkyrie was acting as a bait for Dusk, she persuaded her mother to stay.
When Valkyrie is attacked by Crux in her room, Melissa and Desmond bang on the locked door, shouting to her to open the door. Right after Valkyrie unlocked her door she hurries to her and hugs her while her husband examines the room.
Later, when Valkyrie came back from 'school', Melissa got hugged by her daughter and then reveales along with Desmond that they are expecting a baby. And afterwards she is there when her husband introduces the new baby seat he bought.
Melissa, Desmond and Valkyrie go to Beryl's Christmas party. And when they go back home, she stares with Desmond at Valkyrie because of her behaviour towards Carol and Crystal.
Later, she meets Fletcher Renn for the first time and compliments his hair. She tells Desmond off a few times, asks Fletcher what college he goes to, but before he could say something, Valkyrie tells her that he might dribble, and not to judge him harshly.
After New Year's Eve, when she is already possessed by a Remnant, Tanith Low visits Melissa and Desmond and says that she is Valkyrie's teacher. They welcome her and have a conversation.
She tells Valkyrie that she got sacked and is very sad and desperate because of it. Valkyrie then cheers her up, saying the money she inherited from Gordon doesn't only belong to her but also to her whole family.