Tea. He doesn't even think of how weird it is that he's offered it until after Abigail says yes. Spiked tea was how The Surgeon got some of his victims. It was how he was going to get Gil the night Malcolm had called him to the house.
The two of them enter the kitchen and Malcolm fills the electric tea kettle, his hand still trembling.
"I can't say for sure, since I know there's been talk of ghosts in the hotel." As far as he knows, his father isn't technically dead though. He wouldn't be a ghost. "I haven't heard my father's voice since we left the maze though. Have you heard yours?"