Well, maybe sex is just the beginning for Liz. Liz knows that Kirito is not very good at sex and will just say, "Sex with Inoda is good, but he won't take my heart." In short, Liz will follow the path of Asuna, but at an accelerated pace -
1. just sex with Inoda, no feelings
2. addiction to sex with Inoda, a little in love
3. completely addicted to sex with Inoda, almost forgot about Kirito.
It's the same as Asuna, Kirito, and Inoda, but it's 10 times faster because there's not much time left. I think there are only 3-4 scenes on different days or Inoda will fuck Liz for a day without a break and she will go through all the stages in one day.