Context: Kyoko has devoted her life to Shotaro . When Shotaro came to Tokyo to debut as a singer , she followed him and worked to provide for him . But one day , Kyoko overhears Shota telling his manager that Kyoko means nothing to him .

Question: What is Kyoko 's relationship to Shotaro
Options:
0. His sister
1. His lover
2. His mother
3. None of the above choices .
Answer: 1