Part 2 of a series of short stories. It's a slow building story. My brother slowly pulled my panties away from his face and looked up at me and asked, "Are you sure about this? You want to watch me get off?" "Yes!" I whispered urgently. "Now hurry up and do it before I change my mind." I watched his hips lift upward off of the bed as he slid his pants and underwear down to his knees. His cock was stiff and I was spellbound as if in a trance as I watched it bend down with his underwear and then spring back as the waistband released it. It slapped his abdomen with force as it sprang back. He watched me staring at it and he flexed his muscles making it bounce upward a few times. He laughed at my reaction. "Well?" he asked. I didn't understand what he meant at first but then I realized he wanted my opinion. "It's very nice," I told him softly. "I mean, I haven't really, ummm, seen one like this before. I've only felt it through their pants." "You can tough me," he said hoarsely. He swallowed and cleared his throat. This was affecting him as well as me. "Go ahead." I got down on my knees beside his bed. I gave it a good look. He was big, but I didn't really have much to compare it to. It twitched again as I looked at it. I glanced over at his face and he smiled back at me. It was an amazing thing, really. I had seen him in our younger years but it was all soft and squishy back then. This thing...this man thing was now stiff and engorged. It has veins along the side and a big reddish-pink helmet head on top. I couldn't imagine how I was going to fit that thing inside of me. Correction: Not inside of me! I mean, not his thing. Not my brother's cock. Nope. That wasn't going to happen. But in the back of my mind, I knew as wet and hot as my pussy still was that it would probably slide right in as deep as it would go. I physically shook my head and said, "No." I leaned back and looked at him. "You touch it. Stroke it. Pull it. Do whatever it is you do. Quickly before Mom comes up here and gets us for dinner." My brother reached down and wrapped his hand around his thick cock and squeezed it. I watched as the head swelled a bit and a small drop of moisture came out of the hole on top. "What's that?" I whispered. "Did you just cum?" I thought he might laugh at me, but he seriously answered my question. "No. That's pre-cum. It's slick. It's supposed to help when we have sex, so I slide into you easier." "You mean when you have sex with a girl," I told him. "WE are not going to have sex. Besides, I don't think I can fit that thing inside of me." That filled him with pride, me telling him his cock was huge. He began stroking it. He wrapped his thumb and index finger around it and began sliding it up and down. I just kept watching that cock. It just seemed to get harder and thicker as he stroked it. After about thirty seconds of this, other movement caught my eye and I watched him slowly move the panties up to his face. He took a deep breath in, savoring the smell. "Oh wow!" he whispered, "this is amazing. I love the smell. Did you just cum in these?" "Yeahhhh," I moaned softly. I don't even think I realized I had told him that. I was in a trance watching the droplets ooze from the tip of his cock. After I said that though, his hand began going faster and faster. "Oh, yeah!" he groaned softly. His hand began to be a blur. He was really doing it. He was going to cum! I was watching my brother jack off and he was about to spurt. Unconsciously, my hand had gone down to my pussy and I was gently rubbing myself. "Are you about to cum?" I asked him. "Yessss," he whispered urgently. "Do it!' I urged him. "Cum for me! Shoot that stuff out for me." Suddenly his hand froze and a rope of white cream shot out from his cock. I watched it all as if in slow motion. It flew a few inches upward and landed on his belly, just above his pubic hair. His hand stroked again and another spurt shot out, this one going a bit further. He slammed his head back hard against his pillow as the next few spurts shot out, these just oozing out really and coating his hand and cock. I could smell the scent of it as his hand held his cock but stopped stroking. His hips would flex a few times as it slowly wore off. "Wow!" we both said at the same time and then laughed. "That was incredible!" I whispered back. He took my panties away from his face and smiled weakly at me. "Thanks." I watched mesmerized as he slowly wiped his cum from his stomach and hands with my panties. When he wrapped them around his cock to clean it, his whole body shook again with a shudder. "Still sensitive," he whispered. I stood up and looked down at him. "Well," I said and paused. "Thank you. That was a learning experience." I turned to go. "Wait!" he said with urgency. I turned to look at him. "Can we do this again?" He asked with a pleading look. "I don't think so," I said with a smile. "But this was incredible. Thank you for showing me." He held out my cum-covered panties to me. I shook my head. "Just keep them for the week." I told him. "I don't want you using Mom's panties and get into trouble. If Dad found out, he'd kick your ass." "Okay," he said. "I won't." I walked over to him. "Seriously," I told him. "You can't do this. Using Mom's panties is just wrong. It could cause a lot of problems that we don't need. If you need new ones, I'll give you mine." He looked up at me in disbelief and said, "Really? You're going to let me use your panties to jack off with?" "Look," I replied. "Yes, I'm your sister and I love you. If I have to help you with your perverted hormones to keep you from trouble I will." I watched him put my soaked panties back on his deflating cock as I left the room and closed his door. Later, we ate dinner with Mom as if nothing had happened. We watched TV for a bit and then Mom made him go study for his semester finals. It reminded me that I was so glad I was done with mine. Mom and I watched a few shows and then I went up to my room. I changed into my pajamas. Well, just a big t-shirt and panties, but it was what I slept in. I was brushing my hair listening to the radio when I heard a light tapping on my door. "Come in," I said, but not too loud. I had an idea of who it would be. My brother opened the door and stepped inside. He closed the door quietly and stood there. There was a questioning look on his face, almost pleading. My eyes dropped down to his boxers where his cock was making a giant tent. I looked back at him and met his eyes. "Okay, once more. But then that's it." I told him firmly. As he slid his boxers down revealing that thick cock, I knew in my mind that this wouldn't be the end.