Ignis would most definitely get the fill of him later knot and all, that was a promise. But for now Gladio let's himself change, hands becoming huge and paw like, sharp claws instead of nails he stays two legged for now so he can wrap his arms back around Ignis.

"My mate..." Gladio sighs, happy and a promise both. Then, slow and claiming, he sinks his teeth into the man, hard and breaking skin to leave a livid mark, to leave his scent to mix with his.