She welcomed her first child last August. And Louisa Lytton proudly showed off her incredibly trim physique during a sun-soaked getaway with six-month-old daughter Aura and fiancé Ben Bhanvra on Monday. Wow: Louisa Lytton showed off her incredibly trim physique during a sun-soaked getaway on Monday - six months after welcoming daughter Aura The actress also shielded her eyes from …