In my script (I have 1987 Beaumont) she doesn't kiss Evelyn at all, just Billy (or rather Billy kisses her, see the comment by DontDoSadness). I think that's kinda strange, but whatev.
EDIT: This could change based on the director's decisions though. In our version we're doing something different that makes use of the height difference between Billy and me. He's giving me one of those really comedic hugs, but since I'm so short, my face ends up straight against his chest so I can't talk.
I didn't request it or anything, but I think what we're doing makes the scene a lot funnier, actually.