This shouldn't happen, it's a bug, these terms are normally only enabled in the Itch version. I'll try to find out why this is happening to you and fix it. In the meantime, you can try the password 'familybusiness' in the gallery to switch back to 'sister and mother' mode or place this patch in game folder.
Last I heard Itch isn't even worth bothering with anymore as they are even worse than Patreon (might as well have just kept their brief ban on all porn permanent). Not only is stepcest banned like Patreon but even just people living in the same house/dorm/etc are no longer allowed to fuck either, presumably in the hope to make offsite incest patching by anyone not worth the increased effort (would need to make entirely different renders/setting/story details/etc = might as well be a 2nd AVN). So this is probably on borrowed time on that shitty site anyway. I guess I'll check back next update (0.26?) and hope it's fixed, as step-anything in what supposed to be incest porn just annoys the fuck out of me and makes me go limp.
could just edit all the step-'s out of the dialog, but can get tedious with thousands of lines. At least with real stepcest porn most of the time after a raw screen capture before conversion it's easy to remove the dozen-or so frames of step- at the beginning or end with Virtualdub, since most producers are nice enough to not repeat it every other dialog line after the first time, and in the real world no one calls each other step-whatever anyway unless they hate them, though I guess that would work for realistic violent rape scenes.
