I feel like they both wanna do it and kinda know the other wants to, but Kyouko is too embarrassed so she gives Kouta a hard time for thinking it like she would any other guy but not really. I mean why else would she suggest getting a
private bath to get in together? A swimsuit isn't gonna do shit to stop anything from happening when it comes down to it
She wants it. He wants it. Hopefully this trip ends up being the push they need to just do it so they can both stop beating around the bush and admit it to each other. Then we can get the gags of their coworkers walking in on those conversations at the worst possible time