Liam:
Surprised... He knew that your dad had a brother and five sisters and that you had a bunch of cousins. But he had no idea how big your family was until you went to your grandma's 90th birthday party.
Harry:
Happy, he was happy because he could now have guys his age to talk to other then you and the lads. He wanted to have someone other then the boys to have a conversation other then music.
Louis:
Normal reaction. He is use to big families since he grew up with sisters. But he knows that you hang out with only certain cousins. You aren't use to a big family.
Niall:
Excited... He is into family and so he is glad you have a huge family...