Gladio clearly notices that tone, and while his rumble of pleasure sounds tinny over the phone, Ignis knows what it sounds like in person, how it feels shaking through his chest when Gladio presses into him.

"I'll be there in five."

Of course they have strict agreements that they will never have any trysts in the offices, but that does not mean Gladio cannot come see his mate. After all, he does so miss him. Just this little bit should be enough to get him through. He tells Ignis goodbye so the other can get to a stopping point for his work and gets onto the elevator, making the journey down.