[IENF-397] While I was playing a prank on my sleeping sister, she asked me to fuck her raw, and even though I was about to cum, she locked me in a crab-like grip and I couldn't escape, so I ended up cumming inside her! 7 (Censored)

Even though we're brother and sister, my sister's defenseless appearance makes me super excited, as if she's trying to seduce me! Even though I know it's wrong, I just can't resist... What! Was she really inviting me? Before I knew it, she was asking me to do it, and I couldn't stop either... But it's dangerous! We're family after all! It's dangerous to cum inside! Crab claw lock!?