↓ Transcript
[Sami grins widely, mirroring Brian's enthusiastic body language. Kurt appears to be lost in thought, looking down at the floor.]

Brian: That's how WE found out! Me and Aaron ran into some people on their way here yesterday!
Sami: Oh good! The word's spreading, at least.

[Kurt turns to Sami, somewhat incredulous.]

Kurt: ...How OLD are you?

[Sami crosses her arms in her lap, responding rather tentatively.]

Sami: Umm... seventeen?
Kurt: Oh my GOD.

[Kurt is a bit overcome again, starting to get misty. Brian leans over and touches his forehead to Kurt's temple comfortingly.]

Kurt: This is all just so unbelievable... I was USELESS when I was seventeen, but you girls... wow...