The Demon Trapped Inside

A long time ago a teenager named Ruska was 16 years old and was playing with her knifes. When she was about to get a glass of water she heard this... Mom:" She's just a teen!!!" A man:" But we need a host for the... Thing!" Mom:" But... Her life will be ruined!" The man:" Which is more important?!" The mom: No response. Will Ruska be able to live with the demon... Or will she be killed?