Can I Watch You Jerk It?

I can't believe I was foolish enough to forget locking the door, getting caught by my stepsister, Alice, masturbating. I thought I was in trouble, however, Alice surprised me by being more open-minded. She was really into watching me stroke my sizable manhood.
Clearly, it aroused her, as she later requested to orally pleasure me. With her stunning looks and ample bosom, I couldn't resist, so I allowed her to take me in her mouth. Yet, she desired more, wanting to engage in sexual intercourse and receive my full penetration.