Thanks for the chapter!
It's good that they've told and accepted their feelings for each other. However, doing it in a sauna isn't wise. For starters just sitting there too long can make someone dizzy or pass out so extreme activity would be even worse. Also, this type of thing needs privacy and a public sauna won't be private. Especially if the staff are on the ball and check the users every now and then to make sure they're ok. I really hate the change scene or lame explanation and censorship in these things. If have an adult situation should label it for adults and put in adult section. Then again it's probably really difficult to script the scene, pick the angles, and draw it without making a mistake that make readers think slapping something together would've had better quality as a scene.