Sleepwalking

So my dad married my stepmom about 11 years ago when I was 9. She is awesome and I love her more than my own p.o.s. mom. She has a son who is my age, and we found out that he has a problem with sleepwalking soon after they moved in.
I was laying in my bed watching TV one night, and my door opened. In comes my step brother in a pair of tighty whiteies, and he grabbed a walking stick from the corner and was sweeping the floors of my room with it (guess he was dreaming it was a broom) and his mom comes in, guides him out and apologized for him coming in. The next morning she explained that he sleepwalks.
Fairly regularly he would be found somewhere around the house doing outlandish stuff in his sleep, and it became fairly normal to me.
We were 13, and our parents were pretty drunk from a barbecue earlier in the day. We all went to bed, and I had just fallen asleep when I heard my door open. He was sleepwalking again and had grown out of the tighty whiteies and started wearing boxers at this point, and he walks right up to my bed. His boxers were slightly open in the front and I could see his thing in there. I thought about it, and I figured he wouldn't know anything because he was sleeping, so I leaned over and opened it. His dick wasn't hard, but it came out and I was curious. I reached out and touched it, then held my hand out and kind of lifted it. He just stood there, and I saw that it was starting to get hard. This just made me more curious so I touched it some more. Even kind of stroked it a few times, but then he turned around and walked out.
I felt really weird about it for a while, but then it happened again and I couldn't help myself. He came in my room, and I closed the door behind him. I walked over to my bed and sat down and whispered for him to come see. He staggered over to me, and I pulled his boxers open and started to touch him. It wasn't long before I put it in my mouth and felt it swelling on my tongue. I was so turned on that I began masterbating, and I was just enjoying myself when he came in my mouth. I had no idea that was going to happen, and it kind of freaked me out, but at the same time it was really exciting.
A few weeks after that, he comes back into my room. I was waiting for him since the last time, and I really wanted to see if I could get him to cum again. I was playing with myself as I got him to come over to me. When I had him in front of me, I pulled his boxers down and took his dick in my mouth. He thrusted his hips and I was enjoying the feeling of him in my mouth. It took a little while, but eventually he came in my mouth again. This time he tried to turn to walk away and I hadn't pulled up his boxers, and he tripped. He landed on the floor with a loud boom, and before I could even think of what to do; he was awake. He took a second to realize where he was, and then realized that he had his boxers around his ankles. Then his mom ran in to see what was happening! I was so embarrassed, and scared she would know. She just helped him up, and told him to pull his underwear up, and sent him back to bed. She asked if I was okay, and I just answered "yes mam, I'm fine" and she walked out.
A couple years went by without me trying anything like that again, scared I would get caught. One weekend, I had my beastie come stay over. We went to my room after dinner and I told her about his sleepwalking. I didn't go into details, but I did admit to seeing his dick while he was walking around in his sleep. Later that night, we heard him walking past my room so we followed him out into the kitchen. I remember telling her to be really quiet and we would just watch him to see what he did.
He was in the kitchen, and was just leaning on the counter. She pointed down at his boxers and giggled when she saw the opening. I asked if she wanted to see it, and she looked at me like I was crazy but said "I dare you!" I reached out and opened the opening and let his dick fall out. I looked at my friend who was staring at it and told her. "I did my dare, now I dare you to touch it." She just looked at me and shook her head whispering, "what if he wakes up?" "He wont" I answered confidently. She reaches out and pulls back, saying she was scared. "Just do it, he won't know." I explained, and I reached over and lifted it up in the palm of my hand and told her to just do it. I let it go, and she reached over and grabbed it. Immediately he started getting hard, and I told her to stroke it. She started to rub it up and down, and I asked if she liked it and she just nodded. I asked her if she was getting hot, and she nodded again. Then I asked her if she wanted to put it in her mouth and she said no, but kept stroking him. I told her I wanted to see her do it, and she finally gave in and leaned in to kiss it. "Open your mouth" She did, and slipped her lips around his head. She stopped right after and we went back into my room. To be continued