Murder on the Cape (2017)

A fashion writer falls in love with a married fisherman in Provincetown, Massachusetts. When she gets pregnant, she leaves town, only to return 2 years later with his child. In a vain effort to bring him back into her life, she demands he tells his wife about his secret son. A few weeks later, she is found murdered, and the fisherman is a prime suspect. Based on the real life case of Christa Worthington.