When Maul sees her holding one of the antler decorations he put up, Maul's eyes narrow. He's gone through the experience enough times to know what just happened and he's not very happy to know someone was viewing something that was very personal and private to him.

"Enjoy the show?" He growls out, an angry, closed-off expression on his face. He uses the Force to yank the antlers out of Luz's hands and set them off on a nearby countertop.