I see all you guys talking about different playthroughs or runs etc, I guess I'm in the minority who automatically goes for the harem path when possible and just unlocks the scenes I've missed at the end of the episode? I only have one save file going at this point.
As far as incest in this, it actually never crossed my mind, maybe because we start off without a mom and no sisters, only child. With that I default to going after any older women in the game, so Jade, Cathy and Bella are top on my list.