Don’t Use Mom’s Panties 3

He started stroking his cock right in front of me. I turned in my chair, but continued to absent-mindedly brush my hair. My eyes were focused on his thick cock and the reddish-pink head as his hand stroked back and forth.

“You don’t have my panties,” I observed. “Is it going to work?”

“I don’t need them if you’re going to be watching me,” he said with a slight grin.

That stunned me. I thought that it was the panties that turned him on. I had a lot to learn about men and their desires.

“You mean…” I began, “you mean you’re turned on by…ME?”

“Well, yeah!” He said proudly. “Sis, you’re so beautiful. I’ve been thinking about this afternoon all evening.”

I had stopped brushing my hair and was just frozen in place. This was getting too weird.

“Mark, you can’t be getting turned on by me,” I told him. “First, I’m your sister and you shouldn’t even be thinking of me that way. Second, I’m not even sexy at all so that shouldn’t be doing it.”

“Then explain why I’m like this,” he said as he moved a few feet closer to me. His cock seemed to grow larger as he moved closer to me. A drop of pre-cum oozed out and began to drip onto my floor.

“Watch out!” I whispered urgently. “You’re about to drip onto the carpet!”

He just grinned and kept on stroking away. I watched the droplet as it grew and began to break away from the tip of his cock. If he wasn’t going to do something, I was going to have to do it.

I reached over quickly, putting my hand underneath his cock. I could feel the heat coming from him as he gave his cock a really hard squeeze. The drop fell into the palm of my hand. I pulled my hand away from him as if I’d put it on a hot stove.

“Yeah, that’s it,” he moaned. “Let me cum in your hand!”

I stared at the single drop in my hand. It had landed in the center of my palm and I found myself moving my other hand toward it. I was in a daze as I touched the tip of my index finger to it. I moved it around. It was slick. I understood now how that would help us have sex. His cock was so huge and thick that I would need to coat his whole shaft with this for it to fit inside of me. My mind wandered to a picture of me lying on my back on the bed while he moved above me, his cock about to slide inside my pussy.

“Let me cum in your hand!” He said urgently. That woke me up from my trance.

“What? No!” I whispered back at him. “You’re not doing that!”

“I’m going to cum, Sis!” He said quickly.