The singer also banned the Chelsea star from Brit awards - the biggest night of her career so far. "Cheryl was really looking forward to sharing Valentine's Day with Ashley," News of the World quoted a source as saying.
"But at the last minute she requested the schedule be changed so she could practise her big performance and rehearse for hours instead. It's the most romantic day of the year so the fact she made the choice to work when she didn't have to says a lot about where her head is at," the source added.
The scandal follows previous allegations that he cheated with a hairdresser.