It went on: "On one such occasion, Patterson said, 'Koko, you see my nipples all the time. You are probably bored with my nipples. You need to see new nipples. I will turn my back so Kendra can show you her nipples'."

The women, sacked in August last year, say they never followed the requests to undress for Koko.

The foundation's lawyer, Todd Roberts, said in a statement: "We unequivocally deny these allegations and are confident that this case lacks merit."

He said the lawsuit was an attempt by the women to "manipulate a purported employment issue and miscast it purely for publicity purposes".