In the dead of night, a brother and sister, their parents away, find themselves drawn to each other's warmth. She, in her silk nightgown, he in boxers, their breath hitches as they share a glance. He reaches out, tracing her collarbone, she shivers, pressing into his touch. Their eyes meet, lust evident. He slides his hand down, cupping her breast, she gasps, her nipple hardening. She mirrors his actions, her fingers brushing against his growing erection. Their lips meet, tentative at first, then hungry, as they explore each other's bodies, their breaths ragged with desire.