[Of course, Luke doesn't realize what she's doing, despite it being so similar to what happened to him a few minutes ago. So, when she turns absolutely red and looks down... Well, he just thinks she's touched by his offer. So, he lets his smile grow a little while he squeezes her hand gently.]
Then I promise. [And... this is kind of silly, so Luke brings his free hand across and hesitates... but then holds it out to her, pinkie finger out.]
[Action]
Then I promise. [And... this is kind of silly, so Luke brings his free hand across and hesitates... but then holds it out to her, pinkie finger out.]
I'll even pinkie swear on it.