Mother's Boys is a 1994 thriller film starring Jamie Lee Curtis, Peter Gallagher, Joanne Whalley and Vanessa Redgrave.
Jude Madigan (Curtis) suddenly and inexplicably leaves her husband, Robert (Gallagher), and three sons. Three years later, when Robert finally files for divorce, Jude returns and tries to reclaim her former life. Robert refuses and insists on the divorce. Jude does not accept Robert's decision. She tries, unsuccessfully, to seduce him and harasses Robert's new girlfriend, Callie (Whalley). Eventually, Jude manipulates and convinces her eldest son, Kes (Luke Edwards), that Callie is the only person standing in the way of their reunited family.
Influenced by Jude, Kes details a plan to his two brothers, Michael and Ben (Colin Ward and Joey Zimmerman), to scare off Callie, convincing them that it is just a game. As the boys debate the plan, Jude's estranged mother, Lydia (Redgrave) overhears and confronts Kes and threatens to tell their father. Kes tries unsuccessfully to convince his grandmother that it was just a "game" and tries to stop her from calling his dad. A brief struggle ensues and Lydia accidentally falls down the stairs.