She felt uncomfortable telling Nègre that she wanted return to the office to use the toilet, so told him she was cold as an excuse to go back to the building. But she says he walked away, guiding them towards the banks of the River Seine, so she told him she needed to find a toilet urgently.

"He looked me right in the eye and said, 'Oh, do you need a wee?'

"I felt like a child. I thought it was really weird the way he looked at me, almost gleeful."

She says he directed her to the door of a storage cupboard under a bridge on the Seine and said: "You can do it here."

Now, Anaïs is one of nearly 250 women who believe Nègre drugged them in alleged incidents between 2009 and 2018, subjecting them to what is known as chemical submission, where drugs are used to gain control over someone.