Hayate is forced into a situation his only viable option is to do something illegal, unethical, and unbecoming.  After being called a Mom like figure to Nagi, Maria goes to the source on information regarding Nagi’s father.
didn't you realize your little sister 
would be sad if you stole money?
¿No entiendes que si robas
¿no ves que si robas a otros,
Você não entende que sua irmã