Determined to control his beautiful aunt, a man makes an aphrodisiac from instructions found online and secretly increases her dose drop by drop while staying at her home for the summer. Her body grows feverish, her breathing turns ragged, and she twists in unbearable arousal. On the tenth day she finally loses control and attacks him, becoming submissive to pleasure and willing to serve as his personal sex toy for nonstop raw sex and creampies.