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.
With this money you 
used a gun to steal?!
¡No puedes usar un arma para robar dinero!
¡¿Vas por ahí con un arma para sacar dinero?!
Você não pode usar 
uma arma para roubar!