[Noctis pushes his finger in nice and slow and slowly pulls it out then back again. It's painfully slow to even himself, but he's got to stay strong. He wants Gladio desperate for him, and this is probably the only way he's going to get him like that. But when Gladio's voice comes like the low purr, he adds in a second finger and hopes that the other's fingers actually touch him.]

But your tongue couldn't get me open enough to--Ah!

[He lets out a small gasp and his back arches just a bit when his fingers brush against that spot inside. He might be putting on more of a show than he should, but it's for a good reason. If Gladio's going to tease him, then he's going to tease back just as much. ]