I laughed telling him that he'd better go deeper. He wanted to know more until I eventually told him that she liked the idea of teaching a young virgi... lad. He gulped hear this and excitedly told me how he wish she'd teach him.I asked if wanted me to ask her, adding that I would be there also and would he mind me watching. 'I don't mind' he replied.I told him that I'd arrange it for after his birthday night 2 days later, he nodded excitedly, I told him he would have to find a way of getting. My auntie undid the handcuffs and looked me in the eye with my cum still on her face. "Go to your room and rest now darling" She kissed me on the cheek and spanked my ass as I passed her, shocked at what had just happened. I shut the door behind me and started to smile, wow that was so hot. I just imagined my mum's face after I covered it with spunk, she looked filthy. My cock began to harden again and I heard the door open. "Hi hunny, you OK?" "Yes mum" I said all embarrassed. "Did you. " Jennifer replied, her body still trembling with excitement. Robbie isn't here. He's gone off with his friends. I was taking a nap and probably talking in my sleep."Jennifer wasn't a very good liar and Rachel looked at her suspiciously, not believing a word her mother said. She had definitely heard her brother's voice coming from the room and it had sounded like they were shouting at each other. Eyeing her mother up and down, Rachel saw the beads of sweat on her mothers face and noticed that. When he started to cum his body took over and began to spasm involuntarily. The sense of release was huge as his spunk spurted into Sam's contracting vagina. His first couple of ejaculations seemed to go one for ever and he was aware for the first time of his ball sac emptying and refilling. The fact that he was fucking his sister only added to the pleasure and excitement; he wanted her to enjoy it so much. Gradually the length of his ejaculations decreased until after about the tenth cum he.