iiirc, it requires having 25 affection with her, which is more strict than the usual affection checks by design. Basically, she's a tough cookie to crack and there are some choices in the game that will just tank your chances.
It's entirely possible it's too strict, though. We've had a few people think so, but not really enough for me to gauge if it's unreasonable in a blind play through. If it proves to be, the numbers can be tweaked.
There are unofficial walkthrough mods floating around, although I don't recommend them. They are usually the source of the bug reports we get.
As for an official version: maybe. I've been wanting to integrate a walk through in game at some point, but it's always on the back burner -- but there are other things game wide that I want to overhaul to at some point, so it may eventually be added. Some of the scoring, especially when it comes to how the exhibition winner is determined in week 2, is admittedly arcane.
Oh, and I misspoke in my above typo: the threshold for the hug is 22 affection.
