Imo, realistically, in real life this one could take a dangerous turn. Not that I'm expecting it to, since things have mostly always been conveniently going their way so far, but their plan can still go wrong if instead of choosing to unconditionally offer herself to him in desperation, it all becomes too much for her, and she loses it. If you feel you're worthless to everyone, and you can't get any relief, while also being trapped in such a situation, well...it's certainly not unthinkable that you'd go crazy, and try to off yourself or something. Also, I'm still curious how they are going to conveniently explain it away when she inevitably finds out he's been lying his ass off to her and manipulating her all along. It will be painfully obvious the moment she's introduced to his harem. But I'm sure they'll just handwave it of course...