Nobody's. It's an endless limbo. He doesn't give a fuck about anyone neither romantically nor sexually. He is fundamentally broken still.
The incest will never happen. You can tell it from the tone of the story. He would never exploit their guilt, even if he doesn't yet realize just how deeply guilty they feel to the point of even offering sex no questions asked.
Also this is a shounen harem. And as such, nothing happens. Ever.