Strangers to each other until recently, a brother and sister find themselves in close quarters, the tension palpable. One evening, the sister, clad in a thin nightgown, enters the bathroom where her brother is washing up. Catching a glimpse of her reflection in the mirror, she realizes he's watching. Instead of leaving, she stays, her hand slowly tracing the curve of her body. He can't help but stare, his cock stirring in his pants. They lock eyes in the mirror, the unspoken understanding hanging heavy in the air. They've barely touched, yet the taboo of their situation has them both on edge, their bodies yearning for release.