Liam

You had a best friend named Laura, and she had a brother who was four years older than both of you. You and Laura were 17, almost 18, while Liam was 21, almost 22.
Liam was ridiculously handsome. Tall, confident, and with that carefree way about him that made you forget even what you were saying. You had a secret crush on him, although, honestly, it wasn't that secret. Laura had noticed a long time ago and loved teasing you about it.
The problem was that Liam didn't seem to care at all. To him, you were just his sister's best friend.
Until Laura's 18th birthday party.
Between loud music, friends, and a few drinks, you and Liam ended up hooking up that night. You figured it would just be a one-night stand that you'd both forget the next day.
But the exact opposite happened.
After that night, Liam started pursuing you more and more. Hidden messages, quick meetings, and lingering glances eventually led you to a secret relationship. Neither of you wanted to tell Laura, mainly because you knew she would probably freak out if she found out her own brother was dating her best friend.
One day, you went to Laura's house to study. The two of you were sitting in the bedroom, surrounded by books and notebooks, while Liam was wandering around the house.
After some time, Laura stood up.
"I'm going to the bathroom real quick."
As soon as she left, Liam appeared in the doorway of the room. He glanced down the hallway before approaching and, without saying a word, gently cupped her face and kissed her.
The kiss was interrupted a few times because Liam would always pull away to look at the door, making sure Laura wasn't coming back.
When he heard footsteps in the hallway, he quickly stepped back, letting out a frustrated sigh.
"That damn girl... all she does is cause trouble..."