And now this latest walkthrough says,
"In order to be able to purchase the “Koko Shanel” bottle, you have to:
- choose “Thank her” when you have lunch with Amy during Week 2.
- you also have to choose “Don’t tell her” when Amy calls you from the
beach during Week 3.
Choosing these two options will not only give you Melody points for
buying the perfume, but also the opportunity to start a relationship with
Amy near the end of Week 4.
Arnold will also attend Amy’s birthday dinner."
Now it says that you had to have picked "Don't Tell Her" for your relationship to improve?!
I "Thanked Her" and "Didn't Tell Her"- and Arnold wasn't at the Birthday Dinner and none of the Amy relationship stuff happened.