Ignis gets about two seconds to realize he really should have just acted instead of taking the time to speak and then all thought in his brain fades into static. The groan that slips from his lips is an unrestrained thing, sound as uncontrolled as his body is when he arches into Gladio's thigh. While not unwelcome, the extra encouragement is definitely not needed.

They really should move away from the door before this goes any farther, but like hell is he going to be the one to interrupt this in order to suggest it.

With an impressive show of flexibility, Ignis draws his leg up and wraps it around Gladio's waist pressing his heel into the Shield's back. He then growls low in his throat, "Get back up here and I'll show you." Of course, Ignis doesn't really give Gladio much time to obey the command. Instead, he gives the Shield's hair another sharp tug to pull his head up enough that he can crash his lips into his lover's.