A few months ago your father had married another woman, resulting in you now having a step-brother a few years younger than you, which wasn't a problem as you two had become close quickly.

...

You were lying in your room scrolling through your phone while your step-brother had his head resting on your chest.

"You know, if you weren't my sister I would date you..." He said suddenly but then covered his mouth with his own hand, you both widened your eyes at his sentence.