Olivia is definitely not triggering for me and I never used any cheats. All the others have completed normally except for Olivia who's still stuck at 93% and 45 lust and 54 love. 5 days have already gone by and still no trigger. When I look in the Hints it tells me that there's nothing I can do to improve my relationship with her now..
Update. I loaded the game with the save Sycho posted a few posts above and now it works and I can see a picture of all 3 of them on the bottom left hand side.
P.S. Thanks Sycho