Sin of Innocence (1986)

Tim recently lost his mother, still mourning and struggles to maintain the perfect GPA that worries him that he won't get into the college he wants, only to be comforted by his musical talent. Jenny works hard on swim team to please her overbearing father who can't seem maintain a healthy relationship with anyone after his divorce, causing her to question her own struggling relationship. When the two's parents, David and Vicki fall madly in love and marry, they're under the same roof dealing with pressure of a new adjustment they find comfort in each other, and after a time they fall madly in love with each other only to upset the balance of the family causing much turmoil, putting everyone in their home in a rather uncomfortable position and decision no one will want to make.