Is it really incest if they're not blood-related?

[Data_Gold]

You know who are the biggest cowards of all are though? Authors that abandon the incest ship last minute because they are afraid to go all the way, cough Kawaisou na Imouto-chan cough

Chapter 84.6

I genuinely think this author is pathetic for doing that ૮-ᆺ- ა
they even made several fanbox chapters where the onii-chan and imouto fuck, so i have no idea why they ended the series the way that they did ૮-ᆺ- ა