Answer
The secondary wife Tiye and her eldest son Pentawere led the conspiracy to assassinate Ramesses III. Ramesses III had many sons, and Pentawere was not the heir to the throne. Tiye and Pentawere wanted to put Pentawere on the throne instead of Ramesses III's eldest son, Ramesses IV. The conspiracy was successful, and Ramesses III was assassinated. However, Pentawere did not become king, and Ramesses IV succeeded Ramesses III.