Dolly Parton would “have to” retire if her husband took ill. The 78-year-old country music legend – who has been married to Carl Thomas Dean since 1966 – has released almost 50 studio albums since beginning her career in the late 1960s and has starred in a string of movies but revealed that one of the few things that would force her to “pull way back” would be if her husband “needed” her. Asked if she has any plans to retire, she told ‘Entertainment Tonight’: “Not today. Maybe someday I may have to. I’ve always said that if my husband was in ill health or needed me, I would most definitely pul…