Simon Cowell made a point of ordering his boot camp hopefuls not to become romantically involved with each other.
So he is bound to lose his famous temper when he finds out that Cher Lloyd and Aiden Grimshaw are secretly in love.
X Factor sources say Cher, 17, has grown increasingly close to 18-year-old Aiden - who became a bookies' favourite after his performance on Saturday night - and the pair got together during boot camp.
