That may come true, after all, nobody expected a lesbian scene with another Rabiane (slug), but I honestly think that the author could further exploit the scenes with male humanoids, I say I think I could add an animation of game over where the sister's uterus is full of CUM, I know it sounds gotresco, but it will be that type of game where it will be something of the most normal.
But to make that a reality, it means admitting that both Rabiane and the new MC are in a fever loop or dream, maybe the same monster or a different one, or both are a strange experiment, I say if we were shown that they can create chimeras, I don't think it's crazy to think that the MC is in a state of conservation and all we saw is a simulation.