"I'm just trying to figure out the video, Sis," I told her. "I mean, when you do it alone, and it's for real, how long does it usually take you to climax?" I asked, still calculating the different shots I was going to need.

"I don't know, Ron. I've never timed it... ten minutes, I guess? It depends," she said, blushing some more.

"On what?" I ask, sincerely curious.

"On who's watching." She smiled. "In fact, I think you should be naked when we do it."

"What?" I exclaimed, as I was about to put my shirt on.

"Take your clothes back off," she instructed, smiling. "I need to see...