[ Oh, hell, Shiro is beautiful. Shiro's all muscle and heat and Keith is definitely stronger than he looks, because he's helping to brace and support him, his other hand coming to stroke over his chest, leaning down to kiss between those pecs. His weight is never too much, and he's grinning, grinding up against him with a soft moan, enjoying the way he flexes so prettily.

He picks up the lube from Shiro's hand, popping the tube to smear some on his fingers to slick it up before offering it back to him. He enjoys their size difference, how they still fit together perfectly, like they were made for each other. When he asks, however, he's infinitely more fond when he responds. ]

You and no one else, I promise.

[ He murmurs, because this might be a game but Keith means every word of it, enjoying just how his own desire practically roars up in him. Shiro is dirty, so dirty, and Keith loves it. He wants to fill him up, practically come all over him and mark him as his own. ]

I wanna bury myself inside you, puppy. Wanna sink in you and make you cry out -- show me?