Revenge on a Salvatore

Someone explain

"I'm telling you, she had this all planned!" Elena is crying.
"You should never have gone down there!" Stefan is shouting.
"Someone explain," I say.
"Elena went to see Katherine in the tomb. She found out Katherine compelled that girl in to make Tyler trigger his werewolf side and she turned Caroline for Klaus, she was going to trade them for her freedom!" Damon is yelling getting angrier and angrier.
"Tyler already triggered the curse! He is already a werewolf?" I shout and I throw a lamp at the wall in frustration.
"Awww," Damon pouts "does this mess with your little master plan?" He teases.
"Why didn't you tell me? I told you everything you asked me!" I shout rushing to Stefan. I wrap my hand around his throat and push him to the wall. I bare my fangs to him.
"Let go of him!" Elena shouts grabbing the poker from the fire place. She tries to skewer me but I grab the poker and turn her around so I have her in a headlock with the poker at her neck and my mouth near her neck.
"Not again, let her go" Stefan approaches me.
"One step closer and she dies" I threaten Stefan.
"Stefan, she's hurting me" Elena whines.
"Oh my god shut up," I roll my eyes. Damon starts to come closer to me. I lower my mouth to her neck even more and make eye contact with Damon, he stops. "That's what I thought," I smile and feel the veins under my eyes calm down. I shove Elena in Damon's arms.
I need to see Katherine.
I run to the tomb and make it there in no time.
"Katherine" I say in a singy-song voice "come out come out wherever you are."
A dirty Katherine stumbles forwards.
"Oh, the sister, interesting," she smirks.
"You already made Tyler turn?" I ask her.
She smirks "yeah, he killed a classmate, sorry if that inconvenienced you," she giggles.
"Yeah right," I roll my eyes at her.
I need to get him to show me he is a werewolf either by making him trust me or by catching him.
"What if I got you out of here?" I ask Katherine.
"What do you want from me?" She comes closer to the entrance of the tomb.
"You give me the moonstone," I hold my hand out.
She laughs "no, I think I'm good."
"I thought you wouldn't want to be here trapped forever," I say rhetorically.
"I told Damon and I will tell you, when Klaus comes looking for Elena I will be the safest in town," she smirks yet again.