I clamped my thighs around his wrist so hard his bones ground together.

  

   “Don’t,” I hissed, voice shaking. 

  

   “You pull that hand out right now and I scream loudly. I’ll wake the whole fucking house and tell them you were trying to rape me while I slept. That you shoved your fingers in your stepsister and wouldn’t stop. Mum will believe me, Dylan. You know she will.”

  

   His whole body went rigid, his breathing fast through his nose.

  

   I leaned in until my lips brushed his ear.

  

   “So you’re gonna keep those fingers right where they are, little brother,” I whispered.

  

    “And you’re gonna call me sis, Understand?”

  

   He swallowed...