Reba McEntire’s marriage to Narvel Blackstock “was always business”. The 68-year-old singer was married to Narvel between 1989 and 2015 – but Reba believes that their romance largely centred on a business relationship. Speaking about her ex-husband on ‘The Drew Barrymore Show’, Reba shared: “I think it works for some people. They can be married or have a relationship and work together. Our work was all the time.” Narvel served as Reba’s manager at one point in time, and the singer admits that business played a huge role in their relationship. She said: “Our marriage was 26 years. “We started o…