The previous night it had been dark, and I had been so bothered by his step-mom’s panties that I hadn’t noticed my son’s lovely penis. Almost in...oluntarily, I licked my lips and fixed my eyes on his stroking hand.“I bet he isn’t thinking of Sara this time,” I thought.My pussy reacted at the sight of my son masturbating and it got wetter the more I watched him pleasuring himself. I lightly rubbed myself over my panties for a few seconds before I forced myself to leave the bathroom. I didn’t want. “I don't know sis, let's just take things slow,” Brian replied. “We've been having sex for 3 months now and we've only been on a handful of dates, seriously I'm not sure we could be going much slower. You won't even call me your girlfriend,” Amanda said. Well, you'd have to be a robot not to feel the tension in the room. “Well, first of all, why do we gotta label stuff, and secondly we'll sleep together when we feel comfortable doing so sis,” Brian said. “Well you felt comfortable letting me. It was my favorite. If ever there was a time I might have considered repeating one of my flings, this would be the one, but I didn't. To be honest, it happened out of town, or I might have arranged a repeat. It was quick and nasty and hot and fun, Scott. Are you hard?" Yes." Slide into me. I want to get started." Damn, you are excited! You're really wet."She giggled. "I know. Ah! You feel so nice inside me. Be careful with my clit, though. I don't want to come until I finish telling you the. She continued spanking each cheek in turn, with each spank harder than the one before. After about five minutes of spanking she paused and stroked by bottom. "Stand up." she said, sliding her leg off so I could stand. Was that it? That wasn't too bad I thought. "Time to get these down I think." and with that she whipped my white briefs down to my ankles. I stepped out of them. My cock had gone extremely hard during the spanking. She guided me back over her knee, this time locking my hard cock.