Sam and Mary
"Hey," Sam answered. he generally tried to avoid referring to her by any sort of title. Calling her Mom was awkward, but calling her Mary just didn't feel right either, because she was his mom. Even if has technically old enough to be her father. It was a weird thing, the way the time line played out. But then Sam had jumped around the time line more than once in his life before Madison, so it wasn't as weird as it could have been.
"Happy Thanksgiving." He wished his dad could have been here with her. Whatever his feelings for John Winchester, he loved his dad. ANd he knew Mary was feeling the void where John should have been, today.