At the end of "Thoroughbreds," after a tense and manipulative series of events, Lily and Amanda's plan to kill Mark culminates in a chilling climax. They successfully execute their plan, leading to Mark's death. The film concludes with Lily appearing calm and composed, while Amanda shows a more disturbed reaction. The final scenes suggest a complex moral ambiguity, as the girls confront the consequences of their actions, leaving viewers questioning their motivations and the nature of their friendship.

"Thoroughbreds" is a 2017 psychological thriller directed by Cory Finley. It follows two wealthy teenage girls, Lily and Amanda, who rekindle their friendship after years apart. Lily struggles with the pressures of her privileged life, while Amanda, who exhibits sociopathic tendencies, encourages Lily to confront her overbearing stepfather. As they plot to eliminate him, their bond deepens, revealing darker aspects of their personalities. The film explores themes of morality, friendship, and the complexities of privilege, all wrapped in a darkly comedic tone.

"Thoroughbreds" is generally well-received, praised for its sharp screenplay, dark humor, and strong performances, particularly by Anya Taylor-Joy and Olivia Cooke. The film explores themes of friendship, moral ambiguity, and social class through the story of two wealthy teenage girls who plot to solve their problems in a chilling way. Its unique blend of thriller and dark comedy, along with a stylish visual aesthetic, makes it stand out. However, its unconventional narrative may not appeal to all viewers. Overall, it's considered a compelling watch for those who enjoy psychological dramas.

As of October 2023, "Thoroughbreds" (2018) is available to stream on platforms like Amazon Prime Video, Hulu, and HBO Max. You may also find it available for rent or purchase on services like Google Play, iTunes, and Vudu. Availability may vary by region, so it's a good idea to check your local streaming services for the most accurate options.