Brother, Sister, and Mum have sex SeXStoRY

In October of 2010, my Daughter split up with her boyfriend. She was devastated for weeks after that. By this time it was the 28th of October and i had noticed that Sarah had started to go to bed a lot earlier than usual, so one night i decided to go up 10 minutes after her, to see what she was doing. I got to outside of her bedroom, when i heard moans and groans. I slowly opened the door to see what she was doing, when the door was open enough i looked round and i could see her masturbating. I was both shocked and expecting it. She was an 18 year old single frustrated girl. When i was watching her, i found it thrilling, and found my self getting more and more wet. I slid my own hand down into my pants and started to finger my self. sliding it in and out slowly. But then i realized that she could look up at any moment. 30 minutes later, my son came home from a party. I spoke to him about his s****r, and he said that he knew nothing. Later the next night i did the same thing as the previous night, i look round the door to see her masturbating. I closed the door, and then knocked, pretending that i had not seen her. She told me to come in after about 30 seconds. I realized that it was about time to have " the talk ". I said " listen Sarah, i know what you have been doing. I know why you have been going to bed earlier. Its ok, i did the same thing when i was your age. All i want to know is, is there anything that you want to know, anything that i can teach you?". I was surprised by her response, she said " can you teach me how to orgasm ". I said yes. So i undressed, and told her to sit in front of me so that she could watch. I slowly caressed my pussy, rubbing the clit, sliding one and two fingers in and out. I realized that Sarah was getting more aroused. So i sad, Do you want to try. She said ok, and tried on her self. She was mistaken, i wanted her to try it on me. She was shocked, but happy that i asked her to do this. She placed her hand on my stomach, and the other hand, on my pussy, sliding it up and down. She slid one finger in, i started to moan, over the excitement, i didn't realize that my son Adam, returned home, he walked up stairs, and by now he was bound to of heard the sounds. He looked in, and shouted " What the hell is going on ". We both looked up, embarrassed and horny. I looked down to see that his cock was hard, and i said, " Adam, i can see that you are clearly enjoying it, join us. " He was very shocked by this, and slowly undid his trousers, and a big cock, sprung out of his boxers. He walked over to the bed, and knelt down. Me and Sarah shard he cock. It was the best feeling ever, both my son and daughter having sex with me. Adam entered his s****r in the ass, while i sucked on her clit, Adam was about to cum and exclaimed " Im about to cum, should i pull out " Sarah shouted " no, no, keep going " Adam sprayed ropes of cum inside her, and it started to leak out of her ass. I was still sucking her clit, and her body began to jerk, and she then squirted all over my face. We switched roles, and Adam stuck his cock in my ass, while Sarah sucked my clit. I late found out that both me and Sarah could squirt. I did, and it started to dribble out of my pussy. While Adam was filling up my ass, Adam said " i dont want this to end, can we do it again, i love you both " Sarah looked up at me and winked. That was nearly 3 years ago. We still engage in sexual acts 4-5 times a week. We are madly in love, and are planning on making a porno sometime soon.