"Okay Beth, get busy. I know you suck cock. I want to see how good you are at it. I know your mother will be better until you practice a bit, but give...it your best shot."Beth nervously leaned forward, opened her mouth, and took about three inches of my cock into her mouth. With little suction and no tongue action, the teen bobbed her head up and down those three inches of cock. That may have satisfied George, but it was a pitiful excuse for a blowjob, especially when compared to her. I told him how much I loved him, although surely he knew that by now, and then took his delicious cock in my hand and moved it to the entrance of Megans vagina, and held him as she lowered herself onto him. I heard him groan, with pleasure? Surprise? I don’t know, but he did not pull away so I assumed he was happy enough with the situation. I then moved further up the bed and straddled his face, offering him my pussy, while at the same time, Megan reached out to John and took him in her. She says to me, "I got a call today from a guy that I use to know". The conversation goes on and soon she tells me that it is an old boyfriend that she use to fuck in high school and he wants to take her out to dinner because he is in town.Like I said, we have a pretty honest and open marriage so I tell her that she can go but she has to bring him back to the house for a threesome or else she stays home. She agrees but isn't quite sure that he will go for it so I tell her to make sure he knows. When John finished with me, Tim asked Rob if he wanted to fuck me now and Rob responded."No, you go ahead and fuck her. She deserves it."I looked up into Rob's face and he winked, did he know it was me? Did he know he was giving his cousin permission to fuck his own sister? I knew there was no way to stop this without embarrassing Tim, Rob and myself, and ruining my relationship with both of them plus my best friend, Katie. So I decide to let my own brother have me.Tim stood me up and lends in.