I'm trying to rest after going swimming in the pool when my big brother comes in and starts to tickle fight me. What shocked me the most was that he was completely naked and had a massive erection. I know knew right away that he wanted to fuck me so I had to do me best to fight him off. He started tickling me all over my body. I did the best I could to fight him off but I knew that I was losing. He went for my neck at that was it. I just completely submitted to my older brother. The next thing I know was that my brother was laying next to me with his hand on my pussy and he was rubbing it. I placed my hand on his massive thick cock and started jerking him off. We were both masturbating each other brother and sister. Then I feel wave after wave of heat and that's when it came. I had huge multiple orgasms one right after another. I wanted to feel my big brother's cock inside my vulnerable pussy. I wanted him to cum inside me so bad. Then he fucked me and came deep inside my pussy.