Henry, who didn't know the extent of the things Peitho and Hermes asked Luna to do, just thought her job extended to helping out around the house, cooking, running errands. He knew there was a sexual component, but that wasn't any of his business. And from the evidence in front of him, it seemed like such a loving, caring thing.
"That's so nice," Henry said, smiling at her. "That it's fulfilling. I don't know much about Peitho, but Hermes saved my life. Because he knew I knew you. He must love you so much."