This story takes place in the end of Breaking Dawn. This is what would've happened if it had turned into a fight. You need to read Breaking Dawn to fully understand.
BPOV
I walked into the meadow holding Renesmee tight. I saw everybody waiting there. I went and stood next to Jacob. I gave Renesmee a hug and kiss. I then put her on Jacobs back.
"If anything happens Jacob everything you need is in this backpack. Take care of Renesmee. As soon as you see an opening run far away."
Just then the Volturi appeared out of the trees. I turned and faced them.
"Carslie it's been ages. I hope you have been planning to come see me." Aro exclaimed.
"Why yes. We were planning a trip when Alice saw you come to us."Carslie replied.
"Speaking of which where is the little pixie?"Aro questioned.
"She went to go tie up some loss ends."Carslie responded calmly.
"Well as much as I'd love to chat we have some business to attend to. Just hand over the child and we'll leave."Aro demanded.
"I'm not handing over my granddaughter."Carslie stated firmly.
"Pity we're going to have to kill you."Aro sighed.
Suddenly I was pissed. I started seeing red. Then my shield shot out farther than it ever had. I played with it a little bit until I had it wrapped firmly around my family.
"I'm telling you right now Aro she is not an immortal child."Edward spoke for the first time.
"You will be the first to die. She is clearly a vampire child."Aro responded angrily.
My anger was boiling now. He had just threatened my entire family and I was going to be stuck watching my husband die. Fat chance.
"She is not a full vampire. If you would just allow us to explain."Edward pleaded.
"I will not allow you to explain. You have gathered half the vampire world to kill my loved ones. That alone is volatile."Aro yelled.
"They are not here to kill. They are just here to witness."Carslie corrected.
"That is just a fancy word for slaughter. Face it you want my entire family dead so that you can rule the vampire world."Aro stated.
"Talk about slaughter you brought out your entire guard to kill my family."Carslie shot back.
"I will listen no more."Aro shouted.
Just then Aro flicked his wrist and the meadow broke out into fighting.