Quinn knew at once that this girl walking through the door was Elena. But honestly, the only difference was the hair. Katherine had natural, beautiful curls, while Elena's hair was flat as a board. She looked Elena up and down, and when she saw Elena's hand, it was holding another, and Stefan walked in behind her. Instantly Quinn's anger flared up again, noticing this, Damon grabbed her arm, turned her around and whispered in her ear.
"Pretend it's really Katherine. You'd never hate Katherine as much as you hate Elena. You know that. Just pretend, and then once this 'meeting' thing is over, pretend-time is over. Okay?" Damon pulled back and looked at her, Quinn nodded. She turned back around. It was hard to pretend, Katherine had pretended to be Elena before, so Quinn just acted like this was another of those times.
After Stefan closed the door behind them, he looked up, and as soon as he met Quinn's eyes, he released Elena's hand.
"Oh, don't be pretend on my account," Quinn said, gesturing towards the former hand-holding, "I'm only a guest."
Both Damon and Stefan closed their eyes, in a 'Fuck, she heard.' kind of way. Elena glanced between Quinn and Stefan, unsure of what to make of the two.
"Quinn-" Stefan started.
"So you must be Elena." Quinn ignored him completely now. She walked over to Elena, she was standing in the center of the living room. Quinn touched Elena's hair. "They certainly weren't lying when they said you were the doppelgänger. You are without a doubt Katherine's long-lost twin." Elena just watched her, not sure what to make of the beautiful blonde.
"Funny. I'd say almost the same about you and Caroline." Elena said. The girls, in a sense, glared at each other. The girls were going to have tension between them, it was unavoidable. Quinn raised an eyebrow. Stefan and Damon both knew that a smart-ass, bitchy comment was coming, because that's always what followed Quinn's eyebrow raise.
"Why are we here?" Stefan interjected.
"An old flame is returning to Mystic Falls. Oh wait," Quinn said, a smile gracing her face, "One already arrived." She watched Elena's stare shift to Stefan, whose eyes were avoiding her face. "Sorry. Another flame. Your dearest Katherine is returning." Stefan's eyes darted to Quinn.
"What?"
"You heard me." Quinn walked past him, beginning to leave the room, when she heard Elena's heartbeat quicken, a rush of adrenaline. She reached over and grabbed a bottle of alcohol, and in the midst of her hand swinging to meet Quinn's head, Quinn spun around grabbed Elena's wrist with her left hand, and Elena's neck with her right. She squeezed. Stefan started to run to the girls, but Damon held him back. "I could kill you faster than the thought to hit me came into your mind. Faster than your precious Stefan could save you. Watch it, doppelgänger. I'm not one to mess with." She threw Elena onto the couch, and then Quinn walked over to the fireplace.
Stefan and Damon both watched. Elena was a little shaken, but neither could deny how hot it was, to see Quinn in that dominant, aggressive role. Both boys had witnessed it first hand, whether in an act of anger of passion, but both kind of lost their senses for a few minutes, put into a daze. Stefan stood in his spot, two parts of him tugging immensely. One telling him to go to Elena, his girlfriend, the one who is sitting on the couch shaking from fear. The other said Quinn, kiss her and remember the old days, apologize for leaving and just beg for forgiveness. He couldn't go to one without it effecting the other, so he remained.