No. I've been feeding her all the good food, patting her head, chatting with her constantly, given her a bunch of of dresses.
Every--single--time it always ends in "oh shit she's sick and she didn't get better. lol you lose"
So at what point will things change? I managed to get her to go out and feed her pancakes and shortcakes as well as get her new clothes, all while patting her head and chatting with her, but no matter what, I somehow reach a point where she gets sick and I can't make her get better.
Check your love/intimacy points with the status screen. You need a score of 51 for her to survive. Notice that at this point in the game, talking does NOT affect intimacy, only headpats and events do.
Additionally, there is a hidden counter for trust points, of which you will need at least 5. You can only affect those through events:
- Molest her (-1)
- Give her a full meal (+1)
- Tell her you won't mistreat her (+1)
- Give her some chores to do (+1)
- Go out with her (+1) / Go out alone (-3)
- Buy her some pancakes (+1)
- Buy her clothes (+1) and tell her she looks cute (+1)
Finally, some choices (rape, smaller meal, no pancakes, not buying her the dress) automatically lock you into a bad ending.
TL;DR: less talk, more headpats.