A Vow to Cherish (1999)

John and Ellen's idyllic life crumbles when Ellen receives a heartbreaking diagnosis. As a devoted schoolteacher and loving mother, Ellen's illness tests their bond like never before. Struggling to cope, John's once-thriving business begins to falter under the strain. Amid the turmoil, he finds himself drawn to a charming jogging partner, complicating their already fragile relationship. As they navigate the challenges of love and loyalty in the face of adversity, the couple must confront their deepest fears and rediscover the vows they once cherished.