I think I have a bug. I have acquired Caitlin recently (after downloading the latest version), and it seems I can't raise her affection beyond "Friendly" through activities (like going to the diner or stargazing) or through talking. Through talking "Amiable" does appear but as soon as I click "Stop talking" it drops to "Friendly". When I click on "Overview" in the slave menu I don't see any trait that could cause it*. She was jaded but the trait doesn't appear anymore.
I probably should say that I want to do some kind of challenge here : I want to try to raise her affection to the max without sex. I suppose sex would be a way to raise her affection but I don't want to do that.
* The traits that appear are : Pure, Sweet Tooth, Vanilla and Normal