I entice my stepsister to use my sex toy in secret from our mother

I've been craving the sensation of my favorite sex toy, and I know my stepsister has a thing for it. I decided to sneak it into her room while she was out and catch her using it. I hid behind the door, quiet as a mouse, and waited for the perfect moment to strike. As I peeked through the crack, I saw her, her body writhing in pleasure as she used my toy. I couldn't help but be turned on by the sight. I watched as she reached her climax, her body shuddering with pleasure. I knew then that I had to have her, and I wasted no time in making my move. I walked in, revealing myself, and she was shocked to see me. But the surprise soon turned into lust, and we began our secret affair, all under the nose of our ever-watchful mother.