Watching scenes of her having sex without you being there makes no sense. She should either explain it or have you there watching or joining in. Just watching her have sex without you being there feels random and breaks immersion. Might as well just go find a random porn scene on the internet. He could write a scenario where she has sex with a bunch of dudes, but she has them record it, then she shows you the recording, that would make sense. But to just show her having sex without you being there doesn't make sense. It feels like it's male protagonist and female protagonist now. It doesn't work imo.