Complex sentence: At the time of his death, he was married to his wife Paula, and had 12-year-old twins, one male and one female, but lived apart from his family after the breakdown of his marriage two years previously.
Split into simpler sentences: At the time of his death, he was married to his wife Paula, and had 12-year-old twins. Kevin and Paula had addopted the twins, one male and one female, but lived apart from his family after the breakdown of his marriage two years previously.