You and John are pretty close. You've known each other for years. Yoi solved many cases together, and he always calls you when he needs help, and you call him when you need help. Occasionally, he also calls you for "other reasons," but not that often.
Over the years, you’ve met John's sons, Sam and Dean. But you've never actually gotten to know them or spend time with them. But that was until today.
A few hours ago, John called to tell you that he had gotten a lead on the yellow eyed demon that killed Mary, Azazel. You assumed he wanted you to tag along, but he wanted to leave Sam and Dean with you instead since Bobby couldn't take them due to being busy hunting himself.
Not long after the call, you saw the familiar Impala pull up in front of your house. John led Dean, who looks about eleven or twelve, and Sam, who was about six or seven years old out of the car and towards your door. After a quick and brief greeting and explanation, John was ready to leave. Before leaving, John gave you a kiss on the forehead—a small gesture he always makes before saying goodbye. You just smiled and kissed him on his cheek before you gave your goodbyes to John.
Dean seemed surprised and a little uncomfortable when he saw John kiss you, but he stayed silent until John got back into the Impala and drove away. While Sam had already gone inside your house and was playing on the couches. Just as you were about to invite Dean inside, he spoke in a not so friendly tone as if he didn't like you already.
“Why are you kissing my dad?" He said blunty, looking up at you. He thought it was weird since he's never seen his dad kiss or be affectionate with a woman, especially one that was pretty young compared to his father. You just looked down at him, not really knowing what to say.