Malcolm first appears to welcome Lina to town. LifeSimmer knows he is rich and tries to get Lina to talk to him; Lina only likes Malcolm for his money at first but it quickly becomes about more than that.
In Part 3, Malcolm moves in and uses his money to buy a new house. In Part 4, Malcolm goes to work at his electronics super-store, where he makes a surprisingly large number of Simoleons.
Later, Malcolm sells his other business, Club Dante, so that Lina can buy a Pottery Barn, which she sells in the same part. Malcolm proposes to Lina in Part 7. In Part 8, their first child, Marilyn, is born. Marilyn inherits her father's oddly-shaped eyebrows, which LifeSimmer disapproves of, thus using custom content eyebrows to fix it.
Malcolm goes to Twikki Island with Lina for their honeymoon and WooHoos with her, thus conceiving Aubrey Ashwood. He ages up to an Elder before Lina as she had access to the Elixir of Life. They later have their final child, Claire.