After some thought, I decided to handle future kinky content like this:
After progressing with Mercy's story you can unlock sexual exploration aspects of the game. This means that, during game play , you'll be given a "soft" introductory event for new kinks - at which point you're given the choice to continue exploring that kink (or not).
This way you can customize your experience and see the things you like while ignoring the kinks you don't. In short, I don't really have any intention of forcing you into certain paths.

Essentially the player will start on the vanilla side of the spectrum and slowly move towards more extreme exploration, which is why there have been a lot of activities but nothing too heavy so far.
If you've got suggestions for what you'd like to see or have explored in the game, now is the time. I may not have the ability to add everything, but I'll see what I can do.