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.
You're not thinking 
about your sister at all.
No estás pensando para nada en tu hermana.
No estás pensando en cómo se siente tu hermana.
Você não pensa em nada 
na sua irmã mais nova!