not really a particular part, just overall premise. Adding a story that spanned something along the lines of a week would be interesting. Like she needs to finish a report or some work stuff by the end of the week, and throughout the week story events happen that the player can choose to either do or ignore, ignoring/doing could benefit/impede her progress but would also provide the players with a specially made scene.
For example, She'll fuck Robert from Accounting after going on a dinner date with him and he'll agree to help with the numbers side of her report, incresing progress by 5-10% or something like that.
Another could be she agrees to go to a gangbang/orgy and fucks well into the morning, gets to work late the next day so less time to work on the report.