Complex sentence: She became queen of her native kingdom and married Raja Mallasarja, of the Desai family, and had one son; after her son's death in 1824 she adopted Shivalingappa, and made him heir to the throne.
Split into simpler sentences: She became queen of her native kingdom and married Raja Mallasarja, of the Desai family, and had one son. After their son's death in 1824 she adopted Shivalingappa, and made him heir to the throne.