Seriously, it probably was pulled for Underage sexual content. Some of the Sisters and their friends are 15 and 12.
It's up to the site if they ban content or not. My objection is the dishonest pretense that it never happened.
BTW, I downloaded v 0.05 before it was removed. It has quite a bit of content- good for a couple of hours of play, I guess. It has an incest theme (mom & 4 sisters), but so far just kissing and a LOT of nudity & posing. Character Clutter is a real thing on this game. MC has only had one or two actual sex scenes, and those with tertiary characters. It LOOKS damn good, as a wet dream of Little Orphan Annie grown-up with a family and sexually frustrated.