After she has moved in the hotel with Kali, and you, Kali, and Lucia go to the beach and Lucia wants to have a threesome (although Kali may or may not be a sufficient exhibitionist). I believe that's the last part of her story. :)
I dont think so. On my first playthrough, she wasn't a high enough exhibitionist (It says it after her having denied the threesome), so on the second I made sure to double up on it. I know you can visit the gallery for it, but I don't think you can do another actual playthrough of it, although I could be mistaken. :)