Masters of Horror: Sick Girl (2006)

Synopsis
A shy entomologist drawn into a tentative lesbian affair following the discovery of a mysterious new species of bug finds herself faced with a startling metamorphosis in May director Lucky McKee's creep-crawly entry into Showtime's terrifying Masters of Horror series. Ida Teeter's (Angela Bettis) life revolves around bugs, and upon discovering a large unidentified crawler while simultaneously being drawn into a heated affair with a beautiful young woman named Misty (Erin Brown), the studious wallflower's personal and professional lives begin heating up like never before. It seems that the bizarre new insect has some fairly strange feeding habits, and when seduction leads to infection and bloodletting, the stage is set for a horrifying mutation that will find Ida identifying more closely with her insect subjects than ever before. ~ Jason Buchanan, All Movie Guide