Bubble (2005)

In this unique cinematic experiment an unlikely love triangle is born at a doll factory in a small Midwestern town fallen on hard times. Lonely and isolated, long time employees Martha and Kyle have become friends by default in spite of their drastic age difference, but their dynamic is upset by the arrival of a new worker: young, attractive single mother Rose. As Martha grows increasingly wary about Rose's dubious character, she discovers Kyle and Rose developing a relationship of their own. Then a murder is committed, and an investigation begins.

Official website: http://www.bubblethefilm.com/