Ryan Giggs

The Manchester United legend allegedly had an affair with estate agent sister-in-law Natasha, his brother Rhodri's wife. It later emerged that Natasha was having an affair with another United team-mate, much to the ignorance of Giggs (who also allegedly flirted with Natasha's 49-year-old mother). Giggs's wife Stacey Cooke firmly stood by her husband, who took out an injunction over an alleged fling with reality TV star Imogen Thomas, which in turn led Natasha to spill the beans about their 8-year affair.