Thanks for the fast reply.
I assume that by 'confess' you mean the scenes at night that after 3 nights she make you 'repent'. When I did the 'green' path with her I believe I 'confessed' about 5 girls and then stopped having the option to do so. When I did the 'red' path I confessed 5 because in that run I had the friend path with Maddison. In both routes I had the random text in my room when sleeping of her 'influence'. After that, since I didn't saw any progress with Fiona I thought that was it and started the new game +. Was something there after that point that I should be aware of? Nevermind I finally got it.
Also, how do you to initiate her revenge path in the next run? you still need to tend the plants, receive her email & talk to her to start it?