if you talk to her up to idk i got it on the 13th of march you can redo the scene you can get the scene on the 10th if u dont forget to masturbate for the courage you get by doing it (i forgot for 1 day and it took me from a monday to thursday) she is in the music club area or 2 scenes to the left from the classrom on monday thursday or friday
basicly when you have the afternoon masturbate and at night go to the purple prostitute and you should have it by 10th of march
the scene isnt a scripted fail you just have to go for it (it may last all of march no clue)