Monday, Friday, Sunday at 06 pm in her bedroom.
I didn't look fufther.
There's Another Factor because after the first time, I could not give her Chocolates a second time, no matter WHEN I tried. (There is a different image on those days, of her lying on the bed, but she gets grumpy and orders MC out of her room.)
Near the end of 2 weeks, I've got Her Love stat at 38 and fairly Low Risk, but Nothing has changed except she now wants Help with the Dishes (BIG Improvement, That!!!
)
Update: On the 3rd Sunday, with Love >40, I got the Advancement. Now she wants CLOTHES for Cosplay...
This indicates that the Advancements are dependent on the Love Stat. Ok for Lisa, but I just haven't been able to have ANY interaction with Vanessa, even on MONDAYS as hinted.