After a while I think it started to bother him our having sex together, and at the end of that summer we went to West Virginia with our Grandma and spent several weeks there waiting for our Mom to take us back to Colorado after her business was concluded. We didn’t get much time to be alone, so we didn’t get to have sex, but the last time we did do it for several years it was hot and kinky! Mom showed up eventually and we were going to leave in a day or two and Grandma and her wanted to spend time together so they went shopping in town. My brother and I were both horny, I don’t think we had jacked off separately in weeks, so as soon as they were gone I was on my knees pulling my siblings pee dee out of his plaid shorts and mouthing it all over. He was more enthusiastic than he had been lately, and while I was kneeling I dropped my shorts to play with my boner as I sucked him up to his hairless pubes he was humping my face hard and fast. I didn’t want to get my lips any more bruised so I got up and walked over to Grandmas bed and rolled back onto the edge of it with my legs spread and my ankles up in the air. We were both pretty clumsy and anxious because he lined his dick up with my hole and shoved it partway into my young little asshole without any lubrication and I yelled and shoved him back off of me, cursing him because it hurt so badly! I apologized right away because I knew it hurt him and his feelings, but all there was in the house was some Jergens Hand Lotion, so after I got him hard again I greased up my butt with it, resumed my position on the side of the bed, and he stood next to the bed and slid himself into me, nice and slow this time.
God it felt good to have him inside me again, humping away and holding my ankles up around his shoulders, letting my brother grind his cock inside me, and I could only play with myself for a minute or two at a time so I wouldn’t cum until he did. He keep fucking me, and after a bit he said he had to go to the bathroom to pee, but I wasn’t going to waste a second so I told him to go ahead and pee inside my ass; as soon as I did he let go and I could feel my bowels fill with his hot piss. He had to really go and he always had a huge bladder full, so it felt like 10 minutes as he poured his urine into me. Mom used to give me enemas all the time years earlier so I was very experienced being on the “receiving end” of one, but it felt like a lot more fluid than the old fashioned red rubber douchebag held was distending my colon, and it was so much warmer too! He managed to stay hard throughout (which I’m sure made draining his bladder inside of my ass that much more time consuming), and when he was done he asked if I wanted up to go the bathroom, to which I said I really didn’t want to and that I wanted him to fuck me just like I was. He just smiled and started fucking me, although he told me he wasn’t going to pull out because he said it would cause a big mess, and I agreed because I could feel it trickle out my assring around his cock as it was. My belly full of his piss was sloshing audibly as he worked himself into me, and even though he wasn’t sliding in and out his jabbing cock against my prostate made me leak all over.
It was only a few minutes after he had used me as his human urinal when suddenly he moaned and said he was getting off because his weenie was so hot in his pee. I grabbed myself and started furiously rubbing to catch up with him but before I could go he stopped and said he was being pushed out of me because he had finally gone soft. Now the hard part began; as he pulled out of me a bunch of pee dribbled out of my asshole before I could clamp it tight, running down the edge of Grandmas white bedspread (go figure, white) with a big yellow streak. When I saw that I panicked and all horniness went right out of me, I didn’t even go shit out my bellyful but instead grabbed up the spread (fortunately it didn’t soak through to the blanket underneath) and ran and threw it into the washer. My brother had already gone and put his clothes on (I always did the laundry for Mom anyway) so I ran with mine to the bathroom and shut the door. I knew I had time to wash and dry the evidence because they were going to be visiting relatives besides shopping, so I squatted over the commode without sitting down on it and let my brothers hot pee blast its way out of my body, beating my meat furiously with the lotion to get off before my bowels were completely drained. I strained four huge torrents from within my stomach past my prostate and then my sphincter as my climax built up, my hand making a wet smacking noise as it flew around the end of my cock, and my asshole clenched keeping the rest of my brothers DNA and piss within my bloated tummy while I came. I shot load after load on the wall opposite the commode and it ran down the blue tile in rivulets of teenage semen, it hurt so good as I came so hard. I sat down on the toilet, a mess allover and bore down to expel what was left of my siblings juices and pisswater inside me, and the fear of knowing Mom and Grandma would return gripped me, I showered quickly and got the bedspread washed and dried in plenty of time for them to return. They wondered why we were so hungry and sleepy when they got back, and we both spent the rest of the evening laying on the floor and the couch, my asshole tingling from the delicious warm feeling in my bowels from my brothers’ pee.