Can you block specific people from seeing that you are friends with specific people on Facebook?

[Tori]

I want to block my dad and my brother from seeing that I am friends with my Aunt, but I don't want to block them from seeing my friend's list. My Aunt and my mum don't get along, I do not speak with my mum, so I honestly can't be done with holding someone elses grudge, but I also can;t be done with my immediate family getting at my throat.

[Chloe]

Yes, if you go on to security settings, you can tick the boxes saying to hide things from certain people, if you press customise then you can choose these people.
I have the same problem with my cousins :L