I think I have found the reason why many people fail to trigger new scenes in this version: You need to advance Kate's story strictly according to the tips, especially regarding the "help the table" event, because I believe that raising too much affection too early in the game prevent these scenes to be triggered.I understand that you could see 3 scenes of kate and all of Rose.
Did you go to school after period-time of Rose (skipping days) or in her period-days?