[Booker is really close (he's been really close for the past however long this took them, this isn't a new development, he's still sitting on your dick Geto), and he has nowhere to escape as he feels uncomfortably perceived.

his smile is a little complicated]

... That's very fitting.

It's good.

[also, since Booker is close, he may or may not take notice of scars on Curtain's chest that weren't there before. they would be easy to miss if not for the size: a large, fully healed X that spreads across his torso and then a more faint line of scar tissue which seems to be starting to form around the area where his right arm connects to his shoulder.]