'Whoops,' I realized.

We both lay there panting, and I could still feel some of my cum oozing out Crystal's pussy where it rubbed up against my thigh.

My sexual fire was dwindling in the wake of the explosive ejaculation, and it was really only hitting me now that I had just had completely unprotected sex with a woman I knew nothing about. I blamed Crystal's talents as a seductress and also her enormous, round tits.

Crystal seemed content, and she casually groped at her big tits as she lay on the pile of carpeting.

"Crystal," I asked, "You don't think you're any more pregnant than you were a few minutes ago, do you?"

"I wouldn't worry about it," she chuckled, "I only used up my last birth control pill yesterday, so I think we're probably fine. Besides, I was stupid when I was younger. I have had a LOT of sex and a lot of it unprotected. I've taken a lot of frantic pregnancy tests. None of them ever positive." Her eyes flickered to my cock, still engorged, but certainly on the way down, "You're clean, right?"

"You won't be contracting anything from me," I assured her, "I'm not usually so reckless with where I put my cock. I ask these questions beforehand."

"Well it seems like we just got pretty lucky," she smiled. I took a long look at her, her hands slowly kneading her enormous tits as she lay on her back. Definitely remembering this moment for later.

We dressed and found our way back to the main hallway of the train, where we kissed briefly and parted ways.