“There were a group of people attending a self-help group for the day. Because it was pleasant weather, their leader suggested they move things outside.

“But during their session they noticed a couple getting rather fruity on a nearby bench. They were kissing and groping each other. Hands were going up clothing and there was lots of groaning.

“They were practically having full-blown sex.

“Then people realised it was Moss and Doherty — her skinny blue jeans were the giveaway. But a second later the couple noticed they were being watched and pulled away.”

Kate has made a handful of low-key visits to see Pete during his four weeks in the clinic fighting drug addiction.

She has always gone out of her way to enter and exit like a ninja — without being spotted. But it seems like her lust for Pete got the better of her on this occasion