I found myself wondering if anyone my age was doing this, like I'd discovered some sexual secret lost to my generation. She rolled me over on one side... and opened my legs so she could lick from the top of my butt crack all the way down. I found myself humping into the arc of her tongue a bit, anticipating the feeling of her landing on my pussy, which seemed to be throbbing, aching to be licked. I don't know how long she made me wait, but by the time her tongue finally glided up my labia I was. I was very conscious how small myprick was in comparison to the boys at school, all ofwho sported cocks far bigger than mine. But it couldn’t have escaped her notice that as shesaid these dreadful things to me, my pathetic littlepenis started to become hard. At that point shestopped, laughed, and gave my baby erection a hard slapand walk out. But although it was extremely humiliating for me, itdidn’t stop me from wanking straight away. I actuallyenjoyed her humiliating me that way. Mom took a sip of wine before giving a deep sigh like she was about to pick up something heavy. When she looked at each of us I could see her brown eyes were red rimmed. Knowing we made her cry made my heart ache again.“I...” she started and stopped before going on. “I don’t know how this could happen ... you two. I’ve heard your stories. You both take the blame and want to protect the other.” I glanced at Donna, but she just kept looking at Mom who continued, “You are both good kids. And I am. You’re the biological offspring of one Keith Mackenzie, Esquire. It wasn’t planned that way. It just ... happened. In a devil’s threesome with both glorious men! It wasn’t until later that we found out that Dick was shooting the proverbial blanks.“Yes, that’s right. Your legal father is sterile as fuck. You don’t need to worry about him breeding any of us. Just thought I’d clear that up while I had the chance. Childhood mumps made him a genetic dead end. I must admit that I wondered at times..