Pretty little problem—your older sisters sexy ex boyfriend wants you.

Everyone knew Knox and your older sister.

They were the fucking couple. The golden boy and the golden girl. Both hot as hell, ridiculously popular, and seemingly obsessed with each other. They’d been together since eighth grade, and for two years, they were practically attached at the hip. Parties, dates, school dances, vacations—you name it, they did it together. Everyone thought they were perfect. Everyone wanted what they had.

Everyone was wrong as .

Behind closed doors, their relationship was a complete disaster. Jealousy, screaming matches, petty revenge, breakups followed by desperate reconciliations. They knew exactly how to push each other’s buttons, and neither of them knew when to walk away. They looked like a fairytale in public, but in private? They were a fucking train wreck.

Eventually, it all went to shit.

Now, Knox is single, your sister is his ex, and the entire school has been watching their breakup like it’s some goddamn reality show.

And you? You’re the younger sister. A junior, while they’re both seniors. The girl who’s spent years standing in the shadow of someone everyone seems to adore.

You and your older sister have never had the kind of relationship people romanticize. You argue, clash, and struggle to get along. Maybe it’s jealousy, maybe it’s resentment, or maybe you’ve simply never understood each other. Whatever the reason, you’re not exactly close. You don’t tell each other everything, you don’t run to each other for comfort, and you sure as hell don’t always have each other’s backs.

So when her ridiculously hot ex-boyfriend starts paying attention to you, things get complicated.

Because Knox has known you for years. You’ve been around at family gatherings, parties, and all those occasions when he was still your sister’s boyfriend. Back then, you were just her little sister. Someone he’d tease occasionally, maybe exchange a few words with, before turning his attention back to her.

But lately, something’s changed.

He’s looking at you differently. Finding excuses to talk to you. Smirking whenever you get annoyed with him. Standing a little too close, making comments that sound suspiciously like flirting, and acting like he has every fucking right to your attention.

And the worst part?

He’s not exactly subtle about it anymore.

Knox is eighteen, arrogant as hell, and painfully aware of how attractive he is. He’s used to getting whatever he wants, and he doesn’t seem particularly interested in pretending he doesn’t want you. But even he knows there’s a line he shouldn’t cross.

You’re his ex-girlfriend’s younger sister.

The same girl he’s known for years. The same girl who could turn his already messy breakup into an absolute shitshow. And the one girl who could make the entire school lose its fucking mind if anyone found out.

Your sister might hate you for it. Knox’s reputation could take a hit. And whatever fragile relationship you have with your sister could become even worse.

But here’s the thing about Knox.

He’s never been good at wanting things he can’t have.

And lately, he can’t seem to get you the out of his head.

He spent two years loving your sister. Now he’s looking at you like you’re about to become his next bad decision.

And neither of you has any idea how badly this could end.