"Look," Octavia says, turning her attention to her brother, "it's really quite simple. Clarke needs to pretend to have a boyfriend so her mom doesn't keep setting her up with guys she doesn't know or like. Her mom has never met you, and the setup is pretty much a built in cliché—girl falls for best friend's older brother. It's perfectly believable." His sister's enthusiasm is practically oozing out of her pores.

Across from Octavia on the couch, Bellamy watches Clarke's eyes widen. "Except I already said, no, Octavia. It's not happening."

Bellamy rolls his eyes before turning his attention back to his textbook. "Like I'd ever date you, Princess," he remarks coolly.

Clarke scoffs. "Don't even," Clarke says. "We all know that the real problem here is that I'd never date someone like you."

Bellamy studies his sister's best friend for a moment. "Why not?" he asks after a moment, unintentionally synchronizing the question with Octavia.

Clarke closes her laptop, picks it up, and stands. "Because you're an ass and a player, and my mother would never believe I'd date someone like you."

Right after the words tumble out of his mouth, he knows he's proven her point for her, but the key word is after, so he spits out, "She believed you dated Finn, didn't she?"

Clarke just stares at him for a moment, her mouth open in shock, before she storms to her room without another word.

Bellamy cringes when he hears the door slam.

Octavia throws her notebook at him, the wire hitting across his face. "I cannot believe you just said that," she hisses. "After everything that happened because of that guy, you're going to throw her mistakes in her face like that? You really are an ass."

He stands up slowly and hands Octavia back her notebook. "You're right. I'll go apologize."

Octavia's eyebrows raise. "If she'll even let you."