A Mother's Instinct(1996)

A Mother's Instinct is a thriller about Holly Mitchell, a divorcee who remarries widower Carl Gibbons and his two young sons. When she grows suspicious of Carl's past, he vanishes with the boys. Holly discovers a shocking truth: the children's biological mother is alive, abandoned by Carl five years earlier. The two women, bound by their connection to the missing boys, team up to track down Carl and uncover what he's hiding. As they search, the stakes rise and secrets unravel, forcing both mothers to confront a man neither truly knew.