Then I may give it another try some time. But that first arrival at the house is rough, man. First impressions are everything, which is why devs often go back and rework their 0.1 content. The first several lines arriving at the house and talking to the family are all weirdly nonsensical, and not like anything English-speaking humans would say to each other.
Breaking the stereotypes is good, and I'm glad to hear they don't maintain that first impression... But, like I siad, first impressions are everything, and the two of them very much give off the initial impression that they're just like the younger/older sister stereotypes in too many incest AVNs to count. Hopefully this feedback can be useful to you, and I'll look forward to seeing how things change over time.
(Also, kudos for the quick responses to feedback.)