Deadly Vows (1994)

Tom Weston is a short-tempered truck driver who has always aspired to live big. He begins dating Bobbi Gilbert, who is half his age, and plans on marrying her, which is a problem since he's already married to Nancy. Now to achieve the life he's always wanted, Tom begins to concoct a web of lies that lead to betrayal, deceit, arson, and murder. Based on a shocking true story.