Complex sentence: Although she is 19 and out of high school, after the death of her mother, she took over as the family matriarch, cooking the meals and cleaning the house, and thus leads the life of a stereotypical Japanese housewife.
Split into simpler sentences: Although she is 19 and out of high school, she took over as the family matriarch after the death of her mother. She cooks the meals and cleans the house, and thus leads the life of a stereotypical Japanese housewife.