He didn't protest when his hand was moved, he just grabbed Tony's hip instead and laid back. This was the part he was a little more uncertain about, but he trusted Tony enough that he was able to remain relaxed even as he felt the head of his cock at his hole. It was... weird. It felt like there was no way something that big would get inside of him, but he knew for a fact that it would. He was proven correct when Tony pressed into him and Gladio had to remember to breathe. The hand at the older man's hips gripped a little tighter, fingertips digging into skin.

Was it supposed to burn like that? Gladio suddenly felt a strong need to find Prompto and apologise, as well as the handful of women he'd slept with. He hadn't had any idea, okay? He'd guessed but no one had said a damn thing after the fact! It didn't really hurt so much as that stretch that didn't feel entirely natural. And the heavy, too full feeling he felt as Tony sank deeper into him.

At some point Gladio realised he'd made a sound that was halfway between a groan and a moan, his eyes had closed and he was breathing a little quicker. It took a concentrated effort to stop himself from doing that. When he opened his eyes again he caught Tony watching him and gave him a lopsided grin. "... Just... uh... gimme a sec here..." His voice was rougher, more breathless than before. He just needed a second. Just to get used to the feeling. That was all.