Uma Thurman's boyfriend ARKY BUSSON has quashed rumours she is pregnant - putting the star's recent weight gain down to the fact she has quit smoking. The Kill Bill star was rumoured to be expecting her third child after she was photographed looking chubbier than her usual slender self. But Busson - who has been dating Thurman since last summer (07) - has refuted the reports, telling New York gossip column PageSix, "She quit smoking." Thurman has two children with actor Ethan Hawke.