Bah! Played it for a few minutes and it kinda sux! Story: Daddy goes away on a trip and bad guy moves in and rapes older sis, younger sis, and mommy. In that order. After that story kinda pauses and you can "train" your ladies. I suspect there will be cutscenes when ladies get certain stats. I dunno if there're more branches but the game is boring. I would rather grind Big Brother with insanely OP Victor Munroe. And yeah... the graphics were always good in Illusion games but that's where the fun ends. This is a very static corruption grind game and it becomes boring before a successful slimy fap can happen.
Edit: Thank you OP for posting! I missed the last two (des)Illusion games because of the lack of action and some purpose other than the simple fuck fest. I want a bit more depth to my games, yes even in porn.