Makambaire is said to have had several sex sessions with 29 year old brutal rapist Kelly Edney. They allegedly romped on the mental hospital’s Epsom Ward – for patients who are deemed incurable or show no signs of remorse.

It has been revealed that Makambaire popularly known as Mai Sibanda is a prominent member of the ZAOGA (Foward in Faith) church based in Slough. She is the lead singer in the choir and the revelations will horrify fellow parishioners.

Another nurse was also arrested. She is accused of keeping watch as Edney and the mum of one had sex. The nurses, in their 30s, were quizzed by cops under the Sexual Offences Act. They were suspended along with a third nurse who allegedly knew about the affair.

Edney was moved from Broadmoor to top-security Rampton hospital, Notts. His room was sealed off while officers removed sheets and clothing for forensic checks.

The rapist, who also has convictions for arson, assault and hoax bomb calls, allegedly told cops he had full and oral sex with a nurse. Broadmoor in Berkshire was last month slammed for high suicide rates and failure to protect patients. Bosses are horrified by the latest scandal.

An insider said: “It doesn’t get much worse than this.” Edney, of Bridgwater, Somerset, was sectioned under the Mental Health Act. Makambaire, of Bracknell, Berks, earns £30,000 a year as a nurse working on the dangerous and severe personality disorder unit.

Police and Broadmoor confirmed the investigation but refused to comment further.