I didn't live with any stepsisters at the time, nor do I now, but I did live with my parents and younger sister. While I was watching that video, I thought about what would ACTUALLY happen if someone did that.

The two of them eventually ended up going through the normal back-and-forth of oral, then proceeded to have sex. I was watching this one scripted video where the dude snuck into his 'step-sister's' room at night, and found her masturbating. I found some videos to watch while doing the act, but nothing special. There I was, in my room late at night, jerking off as usual. All characters involved in all sexual activity in this story are over the age of 18.