"Well..." I started, choosing my words carefully. "I'm not sure about the 'virtual blowjob', but if you've seen full length porn videos, they usually progress from voyeurism, like we've been doing, to actual sex acts with another person; a blowjob, pussy eating, fucking... that kind of thing."

I stopped, wondering if my brother-in-law actually wanted Maryanne and me to film ourselves having sex. Not that I hadn't thought about sex with my sister... obviously, I had thought about quite it a lot! Hell, we'd been masturbating for each other with every video. Of course, I'm pretty sure Mark didn't know all of that.

"Do you think that's what he means?"...