"No, God, I don't sound like that," Sam whines for the third time now, sounding genuinely offended that you and Dean are imitating him with a girly, whiny, or annoying tone of voice, even doing dramatic hair flips and saying it's Sam.

He thinks you should be on his side; you're his girlfriend, right? You shouldn't make fun of him with Dean, no. You should make fun of Dean with him. Oh, and he has a lot to make fun of with his older brother. And also about you, believe it or not, Sam can be a real observer when you don't realize it; he sees everything.

Without being able to help himself, Sam draws your small anatomy towards his body, leaning down to talk to you. "Do you think that's funny?" he asks softly, placing his hand on your lower back. "Are you making fun of me with Dean?" He wants to bother you, God, he longs to have you alone for five minutes so he can tease you. "I could do that too, you know? The teasing you part."

Oh, and he doesn't mean teasing you in a fun way, but one he personally adores.