Inconceivable

Katie, wearing a cheap brunette wig, is embroiled in a heated fight with a man presumed to be her husband. In a moment of desperation, she stabs him with a kitchen knife, resulting in his death and setting her on a dark path away from her troubled past.

Four years later, we meet Angela, Brian, and their four-year-old daughter Cora, who form a loving family unit. Brian works as a doctor while Angela takes time off to raise Cora, showcasing their close bond and stable home life.

Angela's friend Linda introduces her to Katie, who has a daughter named Maddie. Despite Katie's charming demeanor, her reluctance to share details about her past raises red flags for Angela's mother-in-law, Donna, who senses something is amiss.

Angela confides in Katie about her struggles with infertility and the use of an egg donor to conceive Cora. Angela’s happiness is shattered when she suffers a miscarriage, deepening her emotional turmoil.

Katie begins to step into the role of a nanny for Cora while Angela recovers, but her behavior grows increasingly strange. She snoops around the house, even trying on Angela's clothes, revealing her growing obsession with the family's life.

Angela unexpectedly catches Katie in a compromising situation with a woman, initially assuming it to be Brian. Despite the embarrassment, Angela begins to trust Katie more, unaware of the darker truths hidden beneath her facade.

Katie confides in Linda about being Maddie’s biological mother, revealing a shocking secret. Having abducted Maddie, she expresses her fears of losing Cora due to lack of attention, hinting at her unstable mental state.

In a sinister turn of events, Katie drowns Linda in a lake, eliminating the one person who knew too much about her past. Linda's body is discovered later, but Katie’s manipulations continue to pull Angela and Brian deeper into her web.

As Angela discusses hiring a surrogate with Katie, the tension escalates. Angela's mother-in-law questions the decision, sensing something is not right with Katie, while Angela becomes more concerned about the growing rift in her marriage.

After discovering Katie's manipulations and instability, Angela seeks a DNA test for the girls. However, she soon realizes too late that Katie has drugged her, setting off a chain of chaotic events.

In a final confrontation, Angela confronts Katie about her past, leading Katie to stab herself in a fit of crazed desperation. Well aware of the potential harm to the unborn child, this act triggers a medical emergency.

Amidst the chaos, an emergency C-section reveals the birth of a healthy baby boy named Gabriel. However, the DNA test results unveil a shocking familial connection between the girls, exposing Katie’s deceitful actions.

In the aftermath of these harrowing events, Katie is taken into custody, leaving Angela, Brian, Maddie, Cora, and baby Gabriel to regain a semblance of normalcy. They come together as a family, filled with hope after enduring such turmoil.