She became intent on learning his language, which was very difficult to master. He attempted to teach his language to her, without much success. Ravis then invited Sato to join him in the exotic steampools of Risa, which she did. In the end, they wound up spending the night together.
In the morning after, Ravis said he hoped that Sato doesn't feel that he took advantage of her, but she assured him "not for a minute" did she feel this way, and that although Risa has a lot to offer, she could "spend the entire day" right there with him. (ENT: "Two Days and Two Nights")