Complex sentence: Sarai was 75 years old and had yet to bear Abraham a child, her idea was to offer her Egyptian handmaiden Hagar to Abraham, so that they could have a child by her.
Split into simpler sentences: Sarai was 75 years old and had yet to bear Abraham a child. She had the idea to offer her Egyptian handmaiden Hagar to her husband, so that they could have a child by her.