put a warning that Forced Femdom was part of the main storyline
Easy
"... put a warning that Forced Femdom was part of the main storyline ..."
That's not true at all, just because Ms Cooper is part of the main plot doesn't mean that BDSM is part of the main plot, it's not.
If there are BDSM scenes they will be optional, but that scene was created for the players to see that side of Ms Cooper, just that, if you don't like that, you don't have to do anything else of that style in the game.
We've had a theme of giving characters a few scenes to introduce them and their personality traits, which we've kept consistent with all of the girls in our cast and Mrs. Cooper is no different.
In order to understand how Mrs. Cooper is, you have to see a few scenes or you'll never understand how she develops during the story. A single scene being required to see is consistent with all the girls. We however, as soon as we have some time for that, will make it avoidable due to popular demand.