Even if Ignis cannot vocalize what he needs, Gladio still is able to give it to him. As mates, as lovers, as someone who knows him so well Gladio can always give his what he needs, and what he needs right now is to be so close that they cannot even think of being apart. That he will give to him, that was his promise.

Gladio pants while he changes, letting his were side take over as the pace seems to hit where Ignis wants him to be. His whole body changes, heavier as he leans against his mate, fur as Ignis tangles his fingers through it. Even his cock inside of the other changes, thicker and pushing deeper into him with he slow swell of his knot starting so that they can be tied together.