Kevin Jonas Sr. has been married to his wife of 40 years, Denise, for nearly a decade. The father of the Jonas Brothers, who raised the musical trio with his wife, reveals that his primary focus is spending time with his five granddaughters. He credits his success to his sons' success in their careers and their success in raising them up to the next generation of people. Jonas also expressed pride in the success of his own music and has released a new song, "Key of You," as an anniversary gift to his longtime wife. The romantic ballad captures the resilience of a couple through decades of partnership.