According to Hesiod, Nemesis is the child of both Nyx and Erebus even though some would believe she is the child of Zeus. Greek mythology just has so many characters that it would be hard to keep track of any of them. Some have managed to describe her as the daughter of Nyx only which won’t be right because Nyx can’t produce a child by herself so the father should also be recognized but it would be understandable if they separated at a young age and Nyx ended up raising her by herself. If that is not the case then her father should be recognized even if he had some troubled past at the expense of others.