He's eternally grateful for everything Bomber Jacket's done for him yet he can't stop feeling guilty he was the reason the man divorced his wife. It took a while before he was used to the idea that BJ loved him and took just as long to reciprocate. He loves BJ dearly, diligently watching out for his husband's health, and indulging him in guilty pleasures (like tea).
Luna is like a mother to Duster but her feelings don't go beyond that. Knowing Duster better than anyone, she does find him rather exhaustive and feels helpless knowing she can't fix some of his habits. She only wishes the best for him and would do anything in her power to grant him happiness.