Siller's bulging eyeballs unlocked from the now-closed bathroom door and rotated slowly to me.I smiled weakly at him. What was I going to say? The "na..." story was DOA, I knew that. Jesus, Mary and Joseph, the whole room smelled like sex.Siller, at least, didn't look angry, at least not yet. I think he was too turned on to be angry. I mean, I guess there is a whole category of porn devoted to girl/girl action, and probably a sub-category for interracial girl/girl action, and he had just walked. What made it curious was that at the beginning of the summer, Meredith was the brash one; much more confident and worldly than the more sheltered Erica. Yet in time Erica seemed to mature to a point where she seemed to be the more sexually demanding of the two; an observation that would be confirmed in a most erotic way… Summer was over, and Meredith was returning to college the following week. Erica had applied for the same school and was accepted. Meredith’s parents, very influential due to. A bulge that was really bulging now. I was getting seriously hard now that my urgent need to urinate was relieved.I moved to the basin and turned on the tap. As I washed and dried my hands I considered this weird situation. I'm in a public restroom trying to seduce my sister, or was I trying to encourage her to seduce me while we both tried to make her old boyfriend, who she supposedly didn't care about, jealous by faking a relationship that didn't exist. And my cock didn't care, it was. She opened her legs and I could see her wet, shaven pussy. 'Started without me?' I said cheekily. 'Mmmmmmm' she murmured with her mouth full of my cock. She sucked on my cock for a few minutes till it was full length then she took it out of her mouth. She beckoned me down to kiss her then whispered in my ear 'I want you to fuck my ass'. 'Are you sure?' I asked her. 'Don't worry, I'll be gentle' she said, with a mischevious grin.She rolled over onto all fours - I reached into the bedside drawer.