[Sadly, Tsuchigomori is not a mind-reading supernatural, so he's not going to know you want him to do that unless you tell him, Suga!! Still...]

Is that so... in that case, will you stand up for me for a moment? I want to get a good look at you again.

[He gestures for Suga to stand, before he then gestures to the skirt and frills of the other's maid outfit.]

Hold those up for me so that I get a proper look, won't you?

[Yes, he wants to see how hard you are right now.]