First one that came to my mind was 'Koakuma Kanojo', though Viper GTS also is similar, though both of them were more about tails than wings.Excellent point, (S)T.D. The key word there being "yet". Hopefully the Eve update will include a little fun with her sis. Dawg, didn't know there was a hentai for that. Not surprising though. Sad as it is to say, that rant was a product of my, hmm, unique mind? And Angel With the Crabbed Wings, what did the leper say to the hooker? "Keep the tip!"
The sister thing could be an issue, due to the patreon issue, depending on how he decides to work it. He could do it without a 3P, or he could do like I said before, about making them best friends who just call each other 'sister', or keep it minimal and hope for the best, like with Roxxy's mom. Looking forward to seeing her rework anyway. XD
Maybe one of them is adopted, then no worries... :winkytongue: