I slightly parted the door and there was Kevin pounding his cock in and out of a girl. The girl too was moaning and her moans were getting louder. This is not the first time that I caught Kevin bring a girl home when I am not around. Last time I grounded him for 1 week. This time I thought he is grounded for at least 2 weeks. I was just about to burst into him room and start screaming when I saw that the girl as no other than Carol herself. My voice got stuck at my throat and I was just standing at the door with my mouth hanging open watching my children fuck each other. This was totally unexpected.