British actress Tilda Swinton has confessed to leading an extraordinary double life following a spate of Internet rumours about an alleged affair. The 47-year-old admits to enjoying a romantic liaison with a "delightful painter" while still living with her long-term partner and their two children. Swinton, who is nominated for a Golden Globe award for her role in Michael Clayton alongside George Clooney, spends much of her time away from the family home in Scotland with a mystery partner. And despite having a new man in her life Swinton insists that she is still in a relationship with John Byrne, who is the father of her 10-year-old twins. She tells the Los Angeles Times: "We are the best of pals and adore being parents and are devoted to that project. "We ostensibly live in the same house but I travel the world with another delightful painter. The arrangement is just so sane." Meanwhile, writer/director Byrne, who began his relationship with Swinton in 1990, tells Britain's The Mail On Sunday, "We're amicably living together in the same house, under the same roof. It's extraordinary. We love each other too, in an extraordinary way."