A sweet moaning sound comes from the next room… Even though I know I shouldn't look, I can't help but peek in and see my sister in the throes of masturbation! When did she grow into a woman's body? She awkwardly plays with her pussy, gradually reaching climax. The unguarded sight of my sister's self-pleasure arouses me… Unable to hold back, I stealthily approach the room where she is masturbating.
