It may have been a self-defence mechanism to relieve myself of boredom, but in doing Jill's route I found this overlapping of mechanisms very interesting.
Of course, as
Meushi says, the "canon" way is to avoid both the photo and the lobs (underlined by Jill's message at the end of Tybalt's performance), but in Jill's situation a little jealousy should do her no good.
we really can't believe there's any point in waiting for the perfect first time....
Only jealousy can make her deviate from the plan of not seeing MC for a month (in reality it would end in a nice cheating 99 times out of 100).
as
mindern says, probably a good compromise between jealousy and CHICKish would be the best solution.
and I confess that incredibly I didn't even mind Jill's part in this seventh chapter, excluding of course any reference to blackmail.
even the sexual ending, although while BADIK takes place in college, obviously Jill's story takes place in high school. but it's still enjoyable and less embarrassing than I thought it would be