Oh my daughters father just pisses me off. okay so my friend on Facebook messaged me asking me who…

Oh my daughters father just pisses me off. okay so my friend on Facebook messaged me asking me who is someone so? I said oh that is my daughter's father why do you ask? Her response was oh because he sent a facebook friend request. how can you send a request with my friend not his my friend on facebook but he can't message me anytime anywhere about his daughter?