Am I missing something because the only sessions that triggered for me were the first one where she tries on a bikini and lingerie and the second one which was outdoors, also the dream and dressing room scene didnt trigger at all
You are missing the second photographer event which is in between of those (maybe because you had enough corruption points, you went to the river with Alexa and missed this event, but it's quite strange). The dresser and the dream happen during the worker's mission, he sends you to try the clothes, and after that, he sends you to the inn and there is when you have the dream.
I hope this can help you! (if you chose to stay quiet at the river you win 2 points, with the intro, the bar if you accept the bet and the hot springs you have 10, and the minimum with Alexa is 9 so maybe that's why you escaped the 2º photographer)