Sam is sitting on the couch, bending over one of his books with a cup of coffee on the small round table next to him. He is too absorbed by the book to notice that Castiel stands just a few feets away. First Cas just stands there, uncertain if he shall try and get the other man's attention or not. After some contemplation he decides to disturb Sam from his own little bookworld.
"Sam...?" he begins and Sam looks up at him. "I... I could use some help with this." Slightly blushing he gives Sam his tie, he don't know how to tie it and since Dean is away he has no one else to turn to.
"Sure" he answers, takes the tie and heave himself to his feet. "Eeehm... I have to stand behind you." Sam has only learned how to tie a tie on himself and therefor he needs to stand behind Cas in order to tie this one too. When he gets a slight nod as an answer he moves in behind Castiel and starts to fix his tie. For some reason Sam gets a bit nervous to be this close to the former angel. He feel the warmth of the other man's body against his chest and he has to admit it feel good, which don't help his nervousness.
"So, done" he declares and starts to move away from him, but Castiel stops him by gripping his wrist. The next thing he is aware of is a pair of intensive blue eyes staring deep into his and he can feel his heart punding against his chest and that his lungs seems to be out of air. Even his brain seems to have stop thinking and before he can do anything he feel Castiel's wet and warm lips against his mouth in a soft kiss. At first he don't know what to do but then he pulls the other man closer and places his arms around his waist. He didn't know that he felt like this for Cas, but now it is all so clear.
"I... I love you, Cas" Sam mumbles with his lips still touching the mouth of the former angel. He can feel a small smile as a response to the words he just said.
"I love you too, Sam Winchester" Castiel says after a moment of silence before he force Sam down on the couch.