They were both driving because Tsuna wasn't paying enough attention, in Gokudera's mind. "Alright. You got the wheel then?" He wasn't going to crash and burn or anything?
Riku just chuckled a little and encouraged Sora to lean on him more. He'd always known Sora was a affectionate person when they were just best friends, but it was kind of different now, right? Now he blushed more often. And that amused Riku to no end so that he had to keep trying to see what made Sora blush. "You shut up," he said, grinning.