Married At First Sight couple Polly Sellman and Adam Nightingale have reportedly split ahead of Tuesday's final vow renewal. Viewers watched the combative couple sling insults during Monday's dinner party, with the career advisor, 28, branding her groom, 35, a 'f*****g narcissist'. Married At First Sight couple Polly Sellman and Adam Nightingale have reportedly split ahead of Tuesday's final vow …