Kevin Federline's ex Shar Jackson has claimed he was still with her when he started dating Britney Spears. The 'Moesha' actress, who was pregnant with Kevin's son, Kaleb, when he ditched her for the pop princess, says the former dancer two-timed her and Britney last year. Shar has revealed she only found out about his affair when he flew abroad to shoot a commercial - and ended up spending the next few months touring with Britney. The mother-of-two has now pleaded with Britney, who recently gave birth to Kevin's son, to think about the hurt she caused by stealing her man. She told America's Sister 2 Sister magazine: "How do you call yourself a human being knowing that you put somebody else through that pain? That's a vicious cycle right there, man. We gotta break that." Shar has also begged Kevin to spend more time with his kids, Kori and Kaleb. She said: "I am a very, very independent woman, OK? If I wanted child support that's an easy procedure. All I want from Kevin is his time with his children. That's it, bottom line."