That got her eyebrows raised. "Do you remember how you were questioning me last week? Well, she's the answer. As to why she invited you, I can only fi...ure she wants to meet the other women in my life. She has to figure out how to share me with you." I said that last in jest, but only just.She laughed. "It says here I can bring someone, so I guess I'll bring Trevor. He should be able to let her know she's got you exclusively. What does she see in you, anyway?" she teased, her voice and face. Then I heard it: zzzziiiipppp. Now I didn't know what to do again. Ithought after the kissing she would settle down for a little while. Shewas settling down all right, settling onto her knees. She was goingdown on him with me sitting right there. Dave's head lolled back as hereached down and ran his fingers through her hair.From the position I really couldn't see anything except her head slowlybobbing up and down in his lap. I downed the rest of my wine but darednot get up.Dave opened his eyes,. I felt nervous as getting naked in front of my step sister, was nerve wracking enough but her going down on me was even worse, I just hope I didn’t do a false start. Kelly arrived home and sat in the living room, “I hope you ain’t got crusty cock” “piss off” as we both laughed kneeling in front of me Kelly rubbed the front of my trousers, “mmm seems he is not asleep” and bit her bottom lip I reached forward and felt her tits her rock hard nipples felt so good “oi who said you could touch” she. We heard the front door open, and my Mum and sister come in. Luckily, they went straight to the kitchen and stayed there long enough for us to get dressed. We had the scrabble board set up on the bed before my Mum came through to my room. Our hearts were still racing though.I let Rob take my boy pussy the next day. He was so sweet and almost frustratingly slow and gentle but now that we’d crossed the Rubicon our love life returned to its usual enthusiastic self and continued through to the end.