The tumultuous long-term relationship between Duck Dynasty ’s Lisa and Al Robertson is receiving the Lifetime movie treatment. Al, 61, the eldest son of the Robertson family patriarch and matriarch Phil and Kay , has been married to his wife for more than four decades. The two first met in high school and dated on and off for years before tying the knot in 1984. Then, 15 years into their marriage, Lisa was contacted by an old boyfriend and engaged in an extramarital affair. Rather than letting the infidelity destroy their marriage, the pair reconciled — a chapter of their lives that will now be explored in the movie Faith & Forgiveness: A Duck Dynasty Love Story , premiering Friday on Lifetime. With Luke Benward starring as Al and Haley Ramm as Lisa, the film follows the couple as they “decide if love is worth fighting for, and what it truly means to forgive,” according to an official logline.…