Apologies for this being so long. I wanted to tell what happened, but also how I felt about it. It follows on directly from part 1.
Mark lay on top of me, his erection buried as deeply inside of me as it could possibly go. Our tongues were entwined in a passionate kiss as we basked in the rush of initial penetration. A lot was going on, both physically and mentally.
I’m sure I wasn’t aware of all of this at the time, but since then I have come to observe my own physical reactions during sex. Since there had been no pre-sex penetration with toys or anything, his dick was the first thing to slide in and spread my walls. I had been able to feel every inch as it slid inside. And as much as it was Mark spreading my insides, my vagina was also devouring his cock. It was parting, letting him through its slippery channel, then closing back tightly around the shaft.
As I said, this was the first time I had had vaginal sex with someone else while in a relationship. I had had hookups before when not dating someone, so casual sex itself was not foreign to me. It was the juxtaposition of casual sex while having a boyfriend that my mind momentarily focused on.