Sora was fully thinking about cookies and how he was going to eat a lot of them if he was allowed and how the aunties sure were nice and he hoped he got to see them some before they left when Riku very suddenly asked him to make out. Which, being that it was Riku, really wasn't that weird.
"Hmmmm..." he said, thinking about it for a moment. It wasn't like he was going to say no, it's just that the real question was, which would it be worse for his parents to happen upon? Sora sitting on Riku's lap, or Sora down on the seat with Riku on top? Hmmmm...it was so difficult... "Hmm..." he said again, not realizing that he was just sitting there not saying anything, halfway to buckling his seat belt.