Six years ago, the shut-in younger brother had been sucking his older sister's breasts for ten years straight. When the sister returned home from her pre-wedding trip and reunited with him, a tense and awkward atmosphere filled the air between them. Though the sister coldly declared, "I've already forgotten about the past," the brother, even with her fiancé nearby, couldn't restrain himself—throughout the one-night, two-day visit, he continued sucking his sister's breasts nonstop.