I told Sharon I wanted to start with a sixty-nine so she straddled my head, sticking her ass and pussy in my face as she started to blow me. Now that her ass was in my face, I kissed and nibbled on her butt cheeks but her brown asshole was staring at me, almost calling my name. Sharon told me I could do anything so flicked my tongue across her anus to test her reaction. She didn't flinch so I did it again for a bit longer. I heard a muffled moan of pleasure so I dove in and began to tongue her asshole. Not only did Sharon not object...