Try a few things

At some level showing with another girl was everything I had ever dreamed of, two hot, wet, soft soapy bodies rubbing up against each other. It was better at some level then my dreams, I didn't have to even touch her tits if I wanted to play with some. I could just reach up and press my own larger breasts together as the hot water ran off them. Now when I reached out and touched her body it just felt normal, but there was still an erotic undercurrent that made my heart flutter in excitement. Neither of us were keeping our hands to ourselves and one thing led to another and I felt something large poking me. Looking down I saw my girlfriend was hard again, she pulled me close in a kiss before she commanded: "On your knees.... slut". I was already pretty worked up so I slowly got to my knees. I had my suspicions but coming eye level with her cock it seemed titanic "Holy shit this thing is big" I said in wonder reaching out to feel it. "What can I say, guys wish they had it, and girls wish they were on it" She replied with a smile reaching down to run her fingers through my long wet hair.

I can truthfully say that I had never thought about sucking a cock before, but with one almost hitting me in the face it was all I could think about. Opening my mouth I slowly fit it into my mouth. As I started sucking my girlfriend started calling out commands "Slower" "Faster" "Use your tongue more" "Yes that more of that" "Suck harder" and I dutifully tried to follower her instructions. I started moving faster and faster as I felt myself heating up. As I blew her I reached down to start fingering myself, it took me a bit to figure out but soon I was furiously masturbating. I could tell I was doing a good job as my girlfriend started breathing heavier but I realized I might have done too good a job when she took control. Using both hands she started fucking my mouth using it as nothing more than a fuck toy. Even as I choked and it felt like my jaw was going to break as she **** her cock deep into my throat she didn't stop. It felt like forever but I soon felt a familiar sensation inside my throat and mouth and then almost without warning she exploded. She **** me to swallow the entire cock so the torrent of cum seemed to shoot right now into my stomach. The sensation felt like fire shooting into me and it was too much forcing me over the edge into another orgasm.

"Oh I liked that, we are going to be doing more of this," My girlfriend said breathing heavily "A lot more"