I was just lying there, watching her Reels, getting lost in her smile — when my stepsister walked in. She saw the screen. She saw my reaction. And then she smiled like she knew everything.
“So... you wanna fuck me instead?”
 I laughed it off. Denied everything. But she didn’t buy it. She pulled out her phone, pressed play on a voice message... and suddenly my whole body froze.
She heard what I said.
 And now… she wants me to show her exactly what I meant.