". . . some kind of spirit realm?"

It's strange enough to be one.

She looks over her shoulder every now and then to keep from bumping into him. Back-to-back. Naked. Which is embarrassing. But might not be as embarrassing as it might be if he sees her looking and gets the wrong idea abut why she's -

Yeah, either way you swing it, this is embarrassing (and a little exciting, and she has to choke down a highly improper urge to giggle).