"More?" Kyle echoed as he drew his head back, a grin on his lips as he regarded River. He wasn't precisely certain what she meant by 'more', though he was getting an idea as she returned to kissing him. Deciding that was likely what she'd meant, he returned her kiss.
It took him a few tries to work out the proper amount of pressure and suction to make it feel best (though all of them felt varying degrees of good), and once he thought he had a handle on the kissing part, he started to rub her back gently, holding her body close to his.
"How much is more?" he mumbled against her mouth as he opened his eyes to gaze at her, blinking slightly as he smiled to her. Kissing was nice.