were the twins happy about the 6 others

Well they were only 2 years old when the others were born. I think that they don't even remember life without them. I'm pretty sure they love them.

No they were not. They were barely out of baby-hood themselves. Having 3 brothers and 3 sisters enter the family was very difficult for them. There was a whirlwind of activity when they brought the babies home and it hasn't ended yet.