Dancing With The Stars professional comforts X Factor judge
Derek, 24, is comforting Cheryl following tabloid allegations that husband Ashley, 29, cheated on her with four women.
‘He has been like a rock,’ a source tells the Daily Mirror.
‘Derek‘s told her that whatever the time, day or night, he’s there for her and she really needs someone she can confide in and trust.’
Cheryl, 26 – who filmed a ballroom dance with Derek for single Parachute – boarded a flight back to the UK from LA late last night.
In January 2008, single mum Aimee Walton claimed she had sex with Ashley in December 2007.
Last week, the Chelsea footballer was accused of cheating on Cheryl on two occasions in late 2008 with a secretary.
Now Ann Corbitt, 28, alleges she spent the night with Ashley in Seattle in July 2009.
And 29-year-old Alexandra Taylor, 29, claims she slept with him hours after he first went public about his relationship with Cheryl in 2004.