I think Bella knows what she´s giving up when she turns into a vampire, but she doesn´t fully appreciate it. She knows she won´t be able to go back to Arizona (or any sunny place place for that matter), she knows she won´t be able to ever have a baby (well.... you know what I mean), and she very well knows pretty much every other thing she will never be able to do. But, as I said, she doesn´t really appreciate these things. I mean, it´s Bella! Do you think she would WANT a baby, anyways? And I´m pretty sure she wont have a problem not going back to Arizona; she´d been prepared for that outcome even before she knew about vampires. Also, she knows she loves Edward. No, "love" isn´t strong enough. She will be with the man she adores forever. Truly forever. As they said in Eclipse: It´s a lot to lose, but it´s more to get back.
2. What do you think Emmett and Jasper were going to do for Edward's bachelor party? Was Jasper telling the truth?
They probably are gonna hunt, just not what they would usually hunt. Sort of like having a big "dinner" or something. They´ll probably go looking for something better to eat. A special meal for a special occasion.
And I am 100% certain they wil NOT go to a strip club or drinking or whatever else humans do for bachelor parties.
3. Tanya made a play for Edward long ago. We don't know much about Tanya, but we know quite a bit about Edward. Why do you think he turned her down?
As he has explained many times, Edwaurd always knew who he was looking for. Metaphorically speaking, obviously. He knew he wanted someone that made him happy, and he would need someone that had qualities beyond their looks; a personality of their own, something unique that no one else has. Not to mention the Cullens and the Denali clan had always been friends; it´d be weird to marry someone you´d only known as a friend. Plus, vampires dont go through that "He was always a friend, but now I see him as something more" change. Once a friend, always a friend.
4. About Immortal children. At what age or developmental stage would the Volturi allow them to be created? A two-year-old usually understands the word no, but evidently that wasn't enough. How would they determine if the child could "keep the secret"? What would the determining test(s) be?
I think every child becomes "aware" at their own pace. It depends on how they were raised, on their personality, genetics, you name it. Everything that adds up to what you are. I think the Volturi base their decision of whether or not a child is capable of keeping a secret and knowing what is right and wrong on stereotypes. An "average" five year old probably wouldnt know not to kill people when they´re hungry, but an "average" thirteen year old might. I think the age limit they would set up would be about nine and above (pre-teens). I think its the most reasonable thing to do, seeing as I would very well fit in that category.....
