VAMPIRES: Part 4: The Showdown

Following the tragic passing of their father, step-sisters, Lucy and Ella, relocate to Los Angeles, only to become entangled in a chilling encounter with vampire cult members. Determined to vanquish their nefarious leader and safeguard Lucy's humanity, the sisters enlist the help of the fearless vampire slayer, Serena Blair. The dastardly plan is helmed by the matriarch Anya and her offspring Angelica, who is resurrected from a deep slumber to eliminate Lucy.
With nefarious intentions, Anya pleasures herself, offering Angelica sustenance from her essence. The cunning Anya senses the presence of Lucy and Ella, as the sisters plot their infiltration of the coven's residence. With expert guidance from Serena, the two manage to breach the entry just as Angelica confronts them.
Thanks to a timely intervention from Serena, Lucy infiltrates the mansion to rescue her lost sister, Willow. Yet, unbeknownst to her, Angelica springs into action, subduing Lucy with primal vigor, stripping her bare, and engaging in intimate contact. Meanwhile, as Ella, along with Serena, seal off the premise, Anaya joins Angelica in a closer encounter with Lucy.
Their combined prowess overwhelms Lucy, subjecting her to overpowering affections until she succumbs to their will, assimilating her into their fold. Despite the inferno ignited by Ella outside, setting the stage for Lucy's liberation with a mystical ornament, the enemies close in. Rescuing her sibling from sticky peril, Ella emerges victorious, securing Lucy's semblance, yet haunted by the looming vampire threat.