Castiel sat at a small table in a motel room. Dean sat next to him, tapping his finger on the table impatiently. "What's taking Sam so long?" Dean didn't expect Castiel to answer, but saying it made him feel a tiny bit better. He looked out the window just in time to see Sam arriving from the store with his hands full of grocery bags.
Dean got up and opened the door for Sam, closing and locking it once Sam was inside. Dean and Sam took the food out of the bags and started placing the items all over the table. Once they had everything set up, they sat down, mumbled a "happy Thanksgiving" to nobody in particular, and dug in.
Sam and Dean ate quietly, savoring the flavor of the turkey that tasted better than anything they had so far that year. Castiel sat with them, watching as the Winchesters ate. "I still don't understand. What are we celebrating?"
Dean, focused on eating as much as he could, didn't even look up to reply. "Food." Castiel tilted his head in confusion.
Sam rolled his eyes. "I think I can explain it a little better. Thanksgiving is more about being grateful for what you have and getting together with people you care about and sharing a nice meal with them." Sam smiled at Castiel before returning to the food on his plate.
"Oh," Castiel replied. "Well then I shall also participate." He grabbed a piece of turkey and held it in his hand while he spoke. "I am grateful to have you two. You have taught me so much and have risked everything for me on countless occasions. I'm very lucky to have you both." He took a bite from the piece of turkey and looked at the boys.
Sam and Dean both looked up at Castiel and smiled. Dean replied, "Thanks, Cas. Happy Thanksgiving."