"I wasn't going to, but since you're offering. . ." Peter said in a soft murmur, and moved his cock so that it was pressing between my lips.

"I'm not, you can't, I didn't mean, no, wait, you can't, you wouldn't," I was saying, and saying it as fast as I could, trying to get the message through, but it turned out that yes, he could, and would, and did.

I didn't think he would go in that smoothly, but I must have been a bit more worked up than I'd realised. His cock just seemed to glide into me, sliding all the way in while I was futilely pushing...