What sex acts are actually in the game? What kinks?
Counting all the H scenes would take all night but each Mistress/Domme has scenes between 10-25 each.
As far as kinks there is some overlap all of them got the general femdom vibe (Beat downs, smothering, ass worship, etc.) but each got there own main primary thing.
Iris (The first one) main focus is brat play, verbal humiliation
Velvet (2nd) Mommy dom and wrestling-like holds
Charlotte (3rd) Goddess/body worship, mindfuck, some ntr (but only at bad ends)
Melissa (4th) strict mommy dom, teacher discipline and a main focus on forced sissy (But you can avoid doing the sissy stuff)