Rachel Riley may have been on Countdown for 13 years now, but she's got no plans to step away from the show.The star, 35, tells OK! that she plans to stay on the maths-based show "as long as they'll have me." Rachel, who is currently pregnant with her second child with husband Pasha Kovalev, spoke to OK! ahead of the release of her new maths guide for adults called At Sixes And Sevens.