I was scared for my life knowing that if it was dad I would kill us. The door opened and I was quite relieved then the fear came back as I realized our mum had caught us and we had been busted. But then the strangest thing happened…she smiled. “You don’t know how long I have dreamed of seeing this happen!” Mum bellowed. She soon made for the bed that my sister and I were already engrossed in. Mum could feel her pussy quiv...