@jikorde thanks once more for taking the time to look into this, it's becoming really frustrating but the help is appreciated!
I'll try to answer in order:
- every single item of Ivy's content is done, including the standard bench press scene, the easter egg at the reception and all the sexting;
- tried all the bikinis and every time slot during the day;
- my strength is currently 7, but I tried cheating it to 10 for testing, nothing (her STR is at her normal value of 10).
While I was writing this something else came to mind: is the scene actually triggerd by doing the training with her, or does it trigger randomly by entering the gym when she's there (in the same way as Alice's struggle on the bench does)? If the latter is true, it might just be a bit of bad luck and I'll have to do the back and forth method every 30 minutes to check it (hoping that the bikini doesn't matter, or the testing will take MUCH longer...)