It should be indicated, but you also need some stats in foot worship, then there are some RNG on top of it (12.5% chances).
Keep in mind, playing the game with the intend of triggering a specific event is not how the game is meant to be played (for that there are the cheat codes on Steam/itch/Patreon versions). I understand the frustration of it when you already know the game and just want that one new event, but my objective is to have a simulation, not a catalog of animations.
So the grind for a specific event in the free to play version will always be significant. The other way would be that you are somehow the one in charge and you are the one saying Zoe what to do, which would be the contradictory with the femdom genre.
Now, this being said, if you feel like you tried long enough with the correct conditions and you didn't have the event, always use the feedback system. It forwards to me your logs with the random rolls, stats, and everything I need to know if there is an actual bug or not.
(note that restarting the game erases the logs)