What fetishes can be expected?
I saw your other comments where you asked for these:
Shortstack is in the game with the mom and there's gonna come another super short character later, not really shortstack but just short.
Monster girls are planned, but that's after we're done with the main house stories. I can spoil that one goblin girl is planned.
Pregnancy is planned but that's gonna be right at the end of the game
Femdom isn't planned, but the reverse where you dominate a dominant woman