The daughter of Exceed And Excel, who runs in the colours of Thurloe Thoroughbreds, had been showing up well in her home work and showed a professional attitude throughout.
She broke well from the stalls and jockey Neil Callan settled her into a good rhythm just behind the leaders.
She was still travelling strongly with two furlongs to run and Neil loomed up to join the leaders at the furlong pole.
He eased her into the lead and pushed her out under hands and heels to win by a length and a quarter.
Roger said: "I think she was a little green. She won with her ears pricked and Neil thought she was quite professional. She has been working quite nicely at home."