As it turns out, Gladio's threshold for pain is far greater than most, so lot as he wasn't actually injured he could take a lot. He groaned when Tony began to move within him, faster now, clearly having come to some conclusion that going slow just wasn't going to cut it.

Gladio's breath hitched when one callused hand stroked along his throat, it turned to a moan when those fingers teased at his nipple. He was sensitive there and it shown in the way the little nub harden. He tried to keep the kiss up, but the strain on his shoulder was too much, Gladio had to let go and untwist himself in favour of grabbing a handful of the bedsheets.

"F-fuck..." He grunted and groaned with each deep thrust that rocked both himself and the bed. It was getting harder to think, he was so damn close...