[It's mostly because she's still partially convinced this is all a dream that'll go terribly wrong if she acknowledges it too much. And in the moment she doesn't really want her hands back so they end up on his shoulders to squeeze somewhat firmly.]

You're going to be just fine, and even if you aren't there's nothing that you can do that would really be that bad.

[One more kiss before the penultimate question:] Are you ready?

[It's about time to enjoy the food and for all of his valid worries she thinks he'll be able to get into all that just fine. Nothing wipes you of your insecurities quite like home cooked food.]