I've learned that my step-mother is a very horny woman, she's always ready for sex and most of all she likes trying new things. Now I know why my father was always finding an excuse to go to work. She simply can't leave my cock alone when we are alone. I think my father thinks she lost her interest in sex 'cos she's more calm when he's at home but no, I'm keeping the 'beast' satisfied 3 times a day, sometimes even more.