Knights of the Old Republic II: The Sith Lords*. Fair Strides and DarthTyren for offering help for my problems with scripting The only thing I've ever found close to an adult mod would be an enhancement for the romance with Visas, but that is also only for a male exile, alas. I would have recommended spending more time on creating more variety in the player responses and less on finding appropriate voice-overs for Visas' responses, personally. For Star Wars: Knights of the Old Republic II - The Sith Lords on the Xbox, a GameFAQs message board topic titled 'handmaiden and visas'.
It seems that a lot of people didn't like the romances in TSL - mainly because they were fairly muted and all rather strange.