Can anyone please explain to me the ending of 'all the boys love Mandy lane' I really do not understand the story?

The ending of "All the Boys Love Mandy Lane" reveals that Mandy, who has been portrayed as the innocent girl throughout the film, is actually the one orchestrating the murders. She manipulates the boys around her, ultimately leading to a shocking conclusion where she survives while others perish. This twist highlights themes of beauty and the darker undercurrents of desire, suggesting that Mandy's allure masks a more sinister nature. The film leaves viewers questioning the true nature of innocence and complicity.