Not really, indeed most of the incest games here , usually Mom is always the cherry on top and the most favored character (like Milf Villa and IC1 and IC2) but don't forget that in his other game MILF Control, the sister is the cherry on topYou do realize the game was over as soon as the MC banged Linda? ICTSOR is a MILF man! The canon ending is Bob walking in on the MC and Linda doing the deed. The End! The rest is forced filler content. That's why ICSTOR lost interest in the project right after that update.
There is no more story to tell.