"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 your... um, reaction... you know, while I masturbate." I just stared at her for a minute. Okay, why not? I pulled my jeans and jockey shorts down together and left them in a heap on the floor. My c**k was standing
