They don't kiss again, but that's mostly because neither are totally comfortable with PDA.
It's strange to Anna. She's always loved it – loved the attention. But now it seems... wrong. Sort of. Her relationship with Elsa isn't something to flaunt. It's something special, only for the two of them.
She's special.
So they break apart, but Elsa holds Anna's hand, thumb rubbing absentmindedly.
Anna could get used to this. This easy tenderness.
And if she also kind of wants to kiss Elsa for hours on the sofa, well that's her business.