He remained her devoted friend through to the end of his life .
Although Sergei was devoted to Mathilde , she was not in love with him and used him as a tool to fulfill her ambitions .
Sergei remained Mathilde 's devoted friend through to the end of Sergei 's life .
Although Sergei was devoted to Mathilde , she was not in love with him and used him as a tool to fulfill her ambitions .