[Cater doesn't act like a little brother, though. At least, not Idia's idea of one. Still, he's already agreed.]

[He ducks down a little lower at Cater's pat.]

... wh- when you say it that way it sounds...

[... lewd ...]

D- Don't go telling people it's totally not their business what we do a- alone in our room, either...!

[They'll definitely assume things!!]