Los Angeles: Model Blac Chyna has branded her former partner and rapper Tyga "cheap". Chyna met Tyga, the father of her three-year-old son King Cairo, when he cast her in his video for "Rack city". She thinks she should have been paid more than her $2,500 fee, reports femalefirst.co.uk. "I should've gotten more. He's kinda cheap," Chyna told ELLE magazine. Chyna is currently engaged to Rob Kardashian and is currently pregnant with his child. She says their relationship started after she helped "motivate" Rob, who stepped out of the public eye for two years while he battled depression and weight problems, and help him "do better". "When I linked up with Rob, he was at a point where nobody could really help him," she said. "I'm the type of person that likes to motivate my friends and help them figure out how they can do better. That's how we really started off. When I'm around Rob, I'm never all up in his business, asking questions. I let him be himself and relax," Chyna added.