Reynolds on Monday confirmed she had been told of the complaint last year, though she denied the woman was pressured against making a police complaint.
Morrison on Tuesday apologised to the woman and promised an investigation. “That should not have happened, and I do apologise,” Morrison told reporters in Canberra. “I want to make sure any young woman working in this place is as safe as possible.”
Morrison said he has appointed Department of the Prime Minister and Cabinet official Stephanie Foster to review the process in dealing with workplace complaints, while a backbench lawmaker will investigate workplace culture.
The allegation has intensified pressure on Morrison after a series of allegations of improper behaviour towards woman within the Liberal party.
In 2019, female backbench lawmakers said they felt bullied to support a move to oust then prime minister Malcolm Turnbull, while a former female Liberal staff member last year made an official complaint of improper behaviour by then immigration minister Alan Tudge.
Tudge has denied the allegation.