<P> Stephanie Smothers is a widowed single mother who runs a vlog with crafts and recipes . Emily is a busy working mother, a PR director for a fashion company, whose son Nicky attends the same elementary school as Stephanie's son, Miles . Emily and Stephanie become fast friends, arranging play dates for the boys . They trade confessions, and Stephanie admits that as a teenager, she had sex with her half - brother, Chris . Emily expresses her frustration at the lack of success of her husband, English professor Sean Townsend, and their poor financial situation . </P> <P> Emily has a work crisis and asks Stephanie to babysit Nicky, as Sean is in London . After two days of Emily not responding to calls, Stephanie calls her employer, Dennis Nylon, and he tells her she is in Miami . Stephanie calls Sean, who calls the police . Emily had told both Stephanie and Sean that she hates having her picture taken, leading Stephanie to sneak into Emily's work and find a photo, which she uses to create missing person posters . </P> <P> Detective Summervile reports that Emily lied about Miami, and that she rented a car in Michigan . A fan of Stephanie's vlog reports seeing Emily in Michigan, and the car is discovered near a summer camp, where police find her drowned body in the lake . Stephanie and Sean develop a bond through grief and taking care of the boys, which turns into a relationship and Stephanie moves in with him . Detective Summervile later reveals to Stephanie that Emily had severe liver damage, a large amount of heroin in her system, and that Sean had recently taken out a $4 million life insurance policy on Emily . </P> <P> Emily, alive and in hiding, sends Stephanie an insulting message about her tryst with Chris, causing Stephanie to recall how her husband, Davis, suspected the relationship, and questioned the paternity of Miles . He confronted Chris during a car ride, which resulted in a crash that killed them both . </P>

Who played the twins in a simple favor