[ with seemingly no warning, sex suddenly becomes a frenzied, desperate mashing of hips to ass, the two of them completing a lewd circle between shiro's relentless grip on his hips, forcing keith in deeper as keith yanks on shiro's shoulders to haul him bodily on his cock. whatever the fuck happened to gentle will be an eternal mystery, but this grabbing and fucking better matches the intensity of what keith feels about his best friend and boyfriend anyway. for all that keith has tender emotions about shiro, he's never been able to have them quietly.

and fuck -- nothing about their cube is quiet right now. the ability to praise shiro, let alone talk coherently disappears the instant shiro grabs andmoans full-throated affirmations of love and desire. keith isn't going to last long, not with shiro being sin incarnate, which only spurs him to speed up, until the slap of skin on skin is a sharp staccato in some desperate attempt to get his boy over the edge before keith collides head-first with his own limits.

he just about chokes out a cry of relief when shiro starts tensing and shouting his name, jaw clenched as he grips shoulders tighter to at least fuck him through his climax, but that never happens. instead, shiro starts whining for daddy and that last thread of patience snaps violently. keith lets out a strangled moan, hands shifting up to pull shiro's ass up as he feverishly ruts balls deep inside. ]

Oh god, Shiro! Gonna -!!

[ the next few ticks pass in such a fucking blur of hormones and whined repetitions of baby. between shiro's ass milking his cock and the overwhelming lurch of his own heavy climax, keith's whole body starts going slack, fingers trembling on shiro's hips as his balls empty and slick drips from his ass. gaze unfocused, keith rests his forehead on shiro's chest, murmuring incoherently as his embarrassingly long orgasm keeps going. ]

You make everything so good, baby. Dunno how making love to you just keeps getting better and better...