In August '93, the month Tara Reade left Biden's office, a woman called the Larry King show saying her daughter had problems at a prominent senator's office but did not want to go to the press about it. The woman was Reade's late mother. https://theintercept.com/2020/04/24/new-evidence-tara-reade-joe-biden/

If Biden hadn’t flatly denied Reade was ever harassed or ever complained about harassment, this revelation might be less interesting, as it could be read as referring only to the harassment-though something serious enough to warrant taking to the press. This undermines the denial