I want Stanford!Sam talking about Dean all the time. Like he is with Brady or may be with Jessica and somehow Sam always end up talking about Dean. And Dean this and Dean that and “one time Dean did this thing and I…" , and "I swear to god that Dean...”, “This remind me that Dean used to…" and one day Jess would smile and say "Wow Sam, how big is your crush for this Dean guy?".
And there would be an awkward and long silence and Sam would whisper “Dean is my brother.” And they would never ever talk about Dean again.
And then two years later there are strange sounds in the apartment, and Sam looks upset and nervous, an she doesn’t even need the other guy to introduce himself. Jess knows he is Dean even if she never saw him before.
Jessica can tell by the way Sam is staring at him.