Santana didn't mean to fall in love with him. She was Santana Lopez, for fuck's sake. She couldn't fall in love. Especially not with someone like Finn Hudson.

But she had.

...

It was all her fault too. She was the one who invited him over. She was the one who started the affair. And she was the one who fucked it all up.

...

It had started as a game for Santana. Get Rachel Berry's boyfriend in bed now and then.

Besides, that night with him had been one of the best.

She didn't expect to gain feelings towards him.

...

It happened one night. He had fought with Rachel about something. Something stupid, that only hobbit and Finn would fight about, Santana thought.

He's upset about it, which amuses the Latina.

"Look" she tells him "Forget Berry. I can rock your world."

"No, it already-"

"You know that was one of the greatest nights of your life. Don't talk shit with me" she replies curtly.

He doesn't argue.

That was all she needed.

...

He gets back with Berry the day after.

It should've ended then.

But Santana Lopez always gets what she wants.

And sometimes Finn Hudson does too.

...

It becomes an affair then.

But Finn soon has he doubts.

"But what about Rachel?" he asks her one night.

"Fuck Berry if you want. You know I'm better" she replies coolly.

Once again, he doesn't argue.

...

"I can't do this anymore" he tells her at school one day, glancing over his shoulder.

Santana rolls her eyes.

"No. I can't. I can't cheat on Rachel" Finn tells her firmly, before turning and walking away.

Santana feels as if she's been slapped.

...

The sight of him with Berry makes her sick.

She doesn't know why.

Until she comes to the realization that he broke her heart.

Santana didn't even know that was possible.

That fucking asshole.