Wiz Khalifa is keeping his smoking habit away from pregnant girlfriend Amber Rose for the sake of his unborn child. The model confirmed her pregnancy last month by showing off her bump on the red carpet at the MTV Video Music Awards alongside her hip-hop star beau. And the rapper has revealed he has banned cigarettes from their home and only sparks up outside so that Rose doesn't have to endure the smell of smoke. He tells MTV.com, "I smoke outside instead of inside. Everything is all about smells, man. If the smell irritates her, then it gotta go (sic)."