I decided one Saturday that I would demand Robert orally satisfy me. While he was watching college football on TV I hid a few lengths of cotton rope i... the end table by the bed. Later, when I was sitting on the sofa reading and he wanted to go upstairs, I told him, "No."Robert was surprised. I don't think I'd ever told him no before, so he knew something was up. "What's wrong?"I looked up from my book. "Nothing, I want to do something different this evening, that's all."Robert's interest perked. Stroking Janes back, I could feel her moving against Ned in a languorous way. Her bottom rubbed against me but my cock remained limp and still dripping from our recent fucking. I fondled Jane's breast from behind and discovered her long, thin nipples were hard and lengthening. Then Jane raised her leg and I knew she was reaching for Ned’s cock.A few seconds later and she wriggled and dropped down and though I could not see, I knew his cock must now be sliding into her.They began to move. This was getting to be a bit too much. Both Mom and I demanded to know why not. Sue explained that Playboy had offered her a modeling contract separate from the Playmate deal, for lingerie shoots and such. In addition, some lingerie and swimsuit catalogs hired Playboy models as well. For instance, almost half of Frederick’s of Hollywood’s models were Playmates at one time. Sue wanted to try it out.Short of using The Power to kill the idea, I had no way to tell her no. Besides, once I thought. Sean looked over and saw my bulge. “It looks like someone’s horny. I’ll go first.” Without saying another word while still sitting on the couch next to me, he unfastened his khaki pants and slide his pants and his boxers down and a beautiful cock, maybe as long as mine but not quite as thick, sprang up. That was the first I ever saw a cock.“There, now your turn,” he said to me.At that point, I wanted to get up and leave, but something was holding me back. I knew his parents were away, his.