Now that you mentioned it, yeah it was a wet scene, most probably sweat. No, she's not clothed for the most part. Her hair might be tied up like in the screenshot I provided. Background is dark, not a well lit room except for the mattress/bed (might be red) on the floor and the actors. I don't think it was a fetish scene, so no deep kissing and the armpit licking is not really emphasised. She licked her armpit prior to the penetration part. So it was only her looking on the camera then licked her armpit. Later while the guy was licking her, and her face was close to his, they kissed. The only odd detail I remember was the lamp, I don't know why. It was a standing lamp with the wider part of the light shade on top, it was kinda pointing up rather than down. One was in the background and there might be another one on the foreground that showed up occasionally.