Heather Mills has a "secret box of evidence"

Heather Mills, the estranged wife of former 'Beatle' Sir Paul McCartney, claims that she as 10 top-secret tapes showing details about her and Paul's sex life, as well as the couple's bitter rows.

39-year-old Heather, who recently claimed she had a "secret box of evidence" to use against Paul  in her bitter divorce from the multi-millionaire music icon- claims that the recordings prove McCartney, 65, took Viagra pills to spice up their sex life, accepted blame for the breakdown of their marriage and mocked her disability.

A source told Britain's News of the World newspaper: "Some of the details about their sex life will sicken a lot of people and make them see Paul in a different light.

"There are recordings Heather says prove Paul referred to her as a, 'One-legged b***h'.

"She says it's clear from the tape that Paul apologised for the marriage breakdown and for how he treated her.

"Heather believes these tapes will put the record straight and she isn't scared to let these personal details get out."

Heather also claims that she holds evidence of "spiteful phone calls" from Paul's fashion designer daughter Stella McCartney.

The source added: "Stella ranted, 'I hope you lose your other f***ing leg.' Heather says her tapes will back this up.

"The relationship between Heather and Stella has reached rock bottom - they can't stand each other. Heather is convinced her tapes will show the world the real Stella. They are explosive."

Heather has allegedly stored the box of evidence in a bank vault - that only she and her sister, Fiona, know the access code to.