Later, Andrew Nuttall, for Mr Molton, asked him: "Did you, at any stage, seek to hide your involvement with A4Y?"
He said Mrs Barnes, who became chief executive of NHS Professionals when Trust Professionals was launched nationally, knew about A4Y from the start.
He told the court Mrs Barnes, who was awarded a CBE for her work in the health service in 2002, decided to let the nurses leave the homes renovated for them by A4Y.
Euan Duff, prosecuting, told the court Molton and Miners set up Accommodation for Yorkshire (A4Y) in 2000, but hid it from the ambulance trust's board.
Angela Molton became a board member of A4Y when her husband stood down to disguise his involvement, Mr Duff told the court.
Buckley, of Horsforth, Leeds, is accused of conspiring with Molton and Miners to obtain property for A4Y and profiting from the misuse of NHS money.